Your 15 really? Already have a business idea like this? Way to go thinking ahead and being a environmental friendly, bass fishing, productive part to a decaying society.
I'll throw my 2 cents in the ring. Mow some yards or something to earn money and buy the molds and supplies you'll need. Start experimenting on your own soft plastics, researching and studying continue to gain Knowledge.
Second, start local. Check with local authorities first, but collection boxes at local boat ramps is a superb idea, after a day of fishing what fisherman doesn't have used plastics in the bottom of his/her boat? Make sure you advertise on your boxes, "recylcled worms"(etc.) Cheap! Social media, advertise pictures of your products and so on..
Once things pick up Branch out more, more collection boxes in different counties throughout your state, then continue to advertise, go to local fishing expos, tournaments, sharing your idea and products.
You can make this happen if you strive for it. Great idea, I for one as an angler, am glad to see the next generation of anglers being proactive.