If you want free textures i know it sounds sus but deviant art is good and so is artstation. also if you wanna learn to make your own you can get a substance painter educational liscense. Its only for college kids but for the confirmation you can just put the logo of a college since they dont check.
well im not sure as of right now but if i come to that point where i decide to make a game with them i will definitely make a post about it and @omgcchheeessee i will look into it thanks!