Hi I am 30 years old virgin male after years of rejection and pain I found a good girl to start family ,

I want your help about my situation

my mother did not want me to marry this specific girl because she is younger than me (she is 18 years old ) plus I have tried multiple times to get a girlfriend and get laid but girls flake after the first date maybe cuz I come off as a creep or a weirdo

living with parents and planning to still living with them when I get married being a virgin fucked up my mental health big time I suffer from social anxiety paranoia and porn addiction I started watching porn when I was 11 and I cought my father watching porn multiple times which impacted my childhood negatively I am the type of guy who overthinks everything and anything lately I found out that I am paranoid about my future wife because she lives in a small village I was meeting her friends that are slutty and sleep around I am paranoid about her past and if she will cheat when we engage (because I want to start the engagement then the marriage next year ) so it gonna be a long distance relationship for a year before marriage

I am lost I do not know what to do anymore

can you give me some advice big brothers ?