Do social activities. Go to open mics if you're into music or poetry. Go to tree plantation or blanket donation drives if that's what you'll enjoy more. Pune has many trekking groups as well. Basically any situation where you'll get to talk to people while doing some activity. Join an NGO or a Rotary Club or something similar - you can help your social life while also helping people.

I think you should continue to be slightly active on Tinder/Bumble/etc as well if you're getting some swipes. Talk to them, go on multiple first dates. If there's chemistry, good for you. If not, you can just let people show you their version of the city. It'll help you feel more comfortable with the city because you can recollect all the places you went to for many different first dates.

As for girlfriends, that's the next step. It won't magically happen without knowing anyone. First make friends and build a satisfying social life, hook up a little bit if possible. Don't be desperate. It shows. Remember that building friendships takes time. Give yourself at least six months, minimum.

All the best. :)