I've been here for a while, and it really helped a lot, I've been lifting for 2 months now and I'm starting to see noticeable changes on myself, but my main problem right now is the mentality or how I see the world, I'm full of insecurities and doubts, seeing myself not man enough, how can I fix this ? 1- I'm full of insecurities, I feel like there's something to hide from people, and it feels like my brain is searching for anything about me to make me feel like that, like being short for example (I'm 5'5 to '6) or not looking good, what can I do about this ?

2- I have difficulty finding a positive male role model, which is pretty common today,I didn't know how to be a man, how could I find a good role model ?

3- I'm shy, weak, introvert, sensitive, etc.. , a typical beta guy, and I've been like this for the most of my life, to the extent that I thought I was destined to be like this for the rest of my life and that change isn't possible in any way. Can I change what seems to be my core personality trait ? Is it possible to change ?