Hi @NftMyPet ,
Nice idea, good starter project on cardano and you can build further on it. There is some potential.
Regarding your questions:
- most used wallets will be probably daedalus, yoroi, nami
- reaching cardano users: discord servers, twitter, telegram - but you will probably look more for pet lovers then twitter may be your best bet.
Some feedback about the project: I understand the need for fake testimonials, user contributions etc. (not that I advocate them but been there done that - long time in internet already) But if I may give you some hint then it would be to change your terms of service page content so it is not that blatant copy from nft-maker.io pro - they are good guys.
Cheers and welcome to cardano dev community,
Peter