Take a bath
Hair and beard cut (if bald, skip this step)
Take another bath
Go to library/bar/church (pick your type) preferably one that you weren’t before.
Keep you back straight and your chin up.
Be kind and educated to people, say that you’re new there, talk with the librarian/bartender and try to make a little chat
Keep going there until you ve seen the same faces 3/4 times
Approach and introduce yourself
Keep it simples and casual
Eventually you’ll be more comfortable talking and girls will notice that.
Check for an opening (a sprinkle of eye contact, an hey or hand gesture, a smile)
Be yourself and try to make it lightweighted