How can I expand my social circle when people at school don’t like me?

18M and only have 1 friend at school, I have work friends and friends from football but I’m ND so just haven’t managed to fit in.

I do want to expand my social circle tho as I feel like I don’t rlly have too many people. I have like 3-4 good friends or ok friends but would maybe hope to start socialising with girls?