how to talk to guys

guys ..
ive been total loser for the past three years
i ysed to be so outgoing but after covid my social skills died. my last “relationship” (we never even held hands LOLOLOL) was 4 years ago when i was in middle school after i had a huge crush on this guy for two years but never made a move so i didnt talk to any guys during that period too.
now ive totally forgotten how to talk to guys but j also js hate men in general
what do i do when im actually ineterested in someone ?!?!?