I feel your Pain. Sure, you can go buy "jersey gloves" anywhere, mine were 99 cents.
That being said, it's a T-Shirt over your fingers. Any ideas of increased grip, protection from thorns, warmth, etc..... Not Happening.
1st: PRIORITY: what exactly do you need them for? In your case, protection against piercing objects, aka finger protection.
2nd: LIMITATIONS: Do you need a finger/thumb free for any reason? I.e. Touch screens, flipping lighters.
3rd: Cost: depending on you resources and supplies, if you do not want to spend ANY $, it's time to take inventory of what you Have.
Supplies: duct tape, base gloves (like the cloth jersey-style), shoestring, string, scissors, knife, paper,pen or pencil,pieces of "junk" I.e. Thin tin, aluminum foil, cork board, cardboard, flexible rubber, hard rubber, hard plastic that can be cut, dryer lint, CLOTH (Not just denim, Canvas is The Best, the more durable, the better, BUT it needs to be pliant, to move your fingers.
From there, it's all about what you need. For thorns, your MainHand Right or Left, should be given an extra Layer. Perhaps your offhand could provide a cut-off index finger for touch screens or the same for thumb for lighters, etc.
Then: can you do a mitten shape? Easier all around, but no practical for thorns, heck I don't know, it's up to you.
Paper/thin cloth/anything you can cut and is movable and comfortable: trace hand over 2x folded paper. That's your pattern. For mittens keep fingers semi-closed, for fingèrs, spread hand out, to ensure thickness around fingers. If you can make your own gloves using spit and paper,glue, tape, whatever, you can make gloves protecting anything. There will be trial and error. Cut them out after 2 exaggerated copies of both hands. Now you have a base. TEMPORARILY Cut/spit/tape/paste to fit. BUT don't secure anything yet.
Now look at what you have already from list above,and what you thought of while reading me.
My favorites as a 1st layer: t Shirt fabric, old soft towels, COMFORT is king.
2nd layer: Duct Tape. aluminum foil, pieces of old rubber inner-tubing or old kitchen glove pieces. Remember,pliable. This is gonna bend. Reinforce joints as much as possible,but not too thick. I have used all of the above, but you are gonna need an adhesive. Glue, Wax, TREE SAP, tape, whatever.
Set out your base layer. Threading is nice, but you cam use any adhesive you can find. Look at "pressure points" for the job. Those need reinforced. Remember Pliability, but I made some Bitchin Mad Max gloves that included pieces of tin/copper/steel/iron and lead (watch out for load)
For you, you want the PINCHER design re: thorns. Main Hand forefinger and thumb need to be the strongest.
Sap really does work well with thin fabric. Will they last? No, they are homemade with tree sap!
My Ideal Design:
Cotton or fleece 1st layer. Finger Design, with cup-like mitten fold over. (Pattern on paper with fingers very slightly apart) use a safety pin or button and thread to hold finger cover on) if I use this, I may put something heavier on at least one mitten, metal, defense or frustration in mind. Or not.
Duct Tape is good, but only on fingertips, palms, wrists, and between knuckles. Pliability!
So you have at least Paper Gloves with 2 sides "glued", threaded, safety pinned, band aided, whatever. Go to town. One Glove at a time with hand in if possible, add string, tape, bungee, wire mesh, anything you can adhere to the outside. Not too tight on string and same rules as Duct Tape. I love the string type method as well.
Now, aside from joints you have a canvas. Go crazy with the paint!
Reinforced pincher fingers: do you have any rubber? Mix it in for grip as a 3rd layer.
Knuckles? For extra "punch", use your imagination. Duct tape plus wax plus more duct tape, or mix in some metal, thread rope horizontally across and add dimes under duct tape. Spikes are tricky, If you need them, Figure it Out. Make mistakes at your own peril with sharp objects. I prefer metal under the pinky to wrist area, use as a hammer..
Base=comfort and support, wrist support can be added by using coat hangers either wrapped or errrrrrrr clawed.".
Secondary: essential surface that is your canvas to suit your needs. PLIABLE.
TERTIARY: added reinforcement where you need it, want it or might Need it.
Think fleece or cotton with superglue reinforced by tape, then strips of duct tape around anything that does not bend. Or deerskin, moleskin, rats kin, make sure it is secure. The best base is 99 cents and. From there, you can make gloves for gardening, or for combat against the Sharks, or Skinheads. In that case, remember the hammer blow, and avoid glass in any capacity" also, don't fight. Thin wire can be the best of all, but it takes awhile to construct. But you can salvage it easily, champagne wire over cork for example, wire from cords, coat hangers, all is good stuff.
OK an hour of my life for ideas. Buy the 99c Jerseey Gloves as a base. Thin wire around finger tips but not thumb' then duct tape. Coat hangers for wrist/forearm, mix with your favorite rope, metal' or dare I say it Spike. Leave a way to get to skin somewhere whether by mitten flap or open. I use RIGHTY Index, Lefty Thumb.
Good Luck. Wish I could post my "HomeMade Tactical Gloves", but, I think you might get the idea now...........