My suggestion is to look at molds on various sites like Lure Craft, Jann's Netcraft, Dels, Bears, Barlow's, etc. Pick one or two molds that you like and buy them. Buy a few bottles of colors and glitter along with a gallon of plastisol and some heat stabilizer.
Get yourself a cheap microwave and some pyrex cups and give it a whirl. If you like it you can spend the big bucks later for injectors and molds. You can get in for $50 or less depending on what you choose. My first order from Bear's with injectors and a couple of molds was a bit over $300.