By 30, a man should understand that he is not owed a comfortable life, that he must take responsibility for organising his life and that he alone must face the consequences of his decisions. As a man in his 30s, you need to take your finances seriously, pay attention to your health, develop useful skills, build something for yourself and be very intentional about the people you allow into your life.
You should also understand that you cannot spend your 30s living like you have an unlimited supply of time. Some opportunities have a window, some mistakes become more expensive with age, and some relationships will cost you more than you realise. Stop postponing important decisions, stop trying to impress people who have no stake in your future and stop confusing having potential with making progress.