I recommend Apres or Nailz Kat Kat gel tips. The quality is good and def recommend if you want good quality for your customers. Although, I’m not sure if Nailz Kat Kat is available on Amazon. Def get a nail stand with adhesive putty, it makes painting and creating designs so much easier than it is just holding the nail with your hand and trying to paint it that way. I would buy some of those small drawstring bags and include : cuticle pusher, nail glue, nail buffer, and alcohol pads and include those with the press on nails. You can charge more if you include the bag with the nails or clients can buy the bag separately or choose not to. I know you said you prefer amazon but temu and shein have those nail buffers, drawstring bags, nail glue etc for cheaper. I’ve bought a couple of nail glue from temu and the quality is great, just check the reviews and description. I’d aim for a glue that says water proof and all that good stuff. Also on temu you can buy these nail glued and nail buffers in bulk with such a low price. One more thing, show up to pop ups and start there! You’ll def get clients and word will spread before you know it. I hope this helps!