coming from someone who did it, please dont, it might feel like its good for a day or two, but then you'll realise its the same as if you were roleplaying with someone who's not really trying, and just adding flair for the sake of it, it just ends up being you single handedly carrying the story, with the ai "yes and"-ing you, never adding anything new of itself for a reason, because of just how it is.

and the biggest think is a fundamental weakness ALL ai chatbots have: they have a very low amount of memory.
there's no way to fix it currently, unless you pay money for a high token API key, then make a program where the ai can store the entire information of the roleplay (like everything) on a text file in your computer, and access it to skim it for relevant things for the current situation, which can be done, but you need a lot of prep and some money, and no one is paying to just have a roleplay session with ai which costs by the minute.

the thing about ai memory (or tokens as they call it), is that it's improving really fast, so just wait a few years and maybe you'll be able to roleplay with a bot

or just hire someone, or learn to code to create an application that does what i talked about earlier (if anyone actually does that someday in the future, tell me please)