Basically what you wanna do is find townreads and find mafia using process of elimination.

Review some games and see what town fellas say on 3 way lylo. Use those lines to towntell.

review your games. look at what people scumread you for and work on those things individually. there isn't really a lot of one size fits all advice other than to try to act naturally as town and to pretend in your mind that you're town when you're mafia. also look for the correct reads that other towns have in your games and see how they get those reads. this isn't that different from a lot of games in that you improve either naturally by playing a lot or by emulating other people's play, depending on what type of person you are