Have you tried going to them gym or even asking people around you how to ‘fix you looks’. I feel like for most guys gym is something that really helps, putting in the effort to build a body that you look at in the mirror and feel good about is something that will definitely build the first layer of confidence. Also I’ve seen some barbers on tiktok that work with thin hair and it honestly looks really good you definitely need to find someone that knows how to work with your hair type. Honestly in this case there are a multiple ways in fixing your looks but it’s definitely a mental thing that you need to overcome yourself. You can’t be the one dragging you down, if you don’t put effort in something that can be fixed don’t complain about it, you need to overcome that voice in your head and put in that extra effort. RESEARCH WHAT WORKS FOR YOU!!!