Thank you for the advice, but I already work on converting the rule and mechanic of PF2e to BRP as faithfully as possible for the last 2 week, I really love the rule I just wish the game world to feel more real, and BRP allow me to do that, I like a more specialist type of character and I want the interaction with the world to be more deep, PF2e does a great job with giving me a lot of option but it restrict me to those option, that the reason I want to convert PF2e to BRP because I want the player to interact with the world more deeply and meaningfully.