Ask someone out for coffee. Talk about your week. Ask about theirs. Don’t treat the interaction as a pass/fail. Repeat. If you have mutual attraction then nature will play out.
Doing the bare minimum hygiene and the appearance of happiness drastically improves your chances.
Dating is for finding someone you enjoy being around. Sex is a result of growing closer.
Obviously some people have it easier than others but I have peers that just refuse to ask people out for coffee or a lunch. I’m a late millennial if that matters.
Be a decent person and if a love interest doesn’t personally find you attractive they WILL tell their friends. NEVER talk poorly about your previous relationships. Learn a few jokes.
The privatization of love is a real problem but the classic approach isn’t dead.
Get out of the house. Join some group activities. Enrich yourself. Make some friends.
If you are looking for a more specific example then try yoga or an exercise group like cycling. These kind of activities signal that you are looking to improve yourself and that is always a plus. Just remember not to leer and be polite.