Help me yar

I am a university Student doing software engineering I left porn and masterbation a (short time ago) but every time my mind filled with new ideas to do masterbation.Today I wanted to drink alcohol but my friend stops me even it was first time to touch an alcoholic drink . I have many other probems I want a girl but I can't make girl friend lack of confidence Every day I got new ideas to do some bad new .does it affect my brain or mental health or I already Been consumed because I started masterbation from age 13 and now I am 20 I only can left it for 10 days max 😭 help me