Is there a limit for making custom tilesets on RPG Maker MZ?

I started to use RPG Maker MZ free trial to learn how to use it and after this I was thinking about buying the full version because I wanted to make a Backrooms Horror Game on it, my question is, can I make infinite custom tilesets or theres a limit? Because a Backrooms Horror Game requires a lot of different textures for tileset if its bigger, on YouTube I found videos of people making custom tilesets just by editing default RPG Maker MZ tilesets if its possible to upload more can someone link me a video about it?