This is hacker news so take it all with a grain of salt but I found that buying clothes that fit, and just buying and trying a lot of stuff to see what worked over a few years led to a massive improvement. I think if you just follow a guide that tells you specific things you will feel weird and get stuck. I'm not saying you should ignore the "rules". I just mean you have to put in some effort and try a lot of stuff. Imitating people you think look cool is an easy way to start and will get you half way there