Need some advice.

I've been on tinder (inb4 "weak dude, approach irl") for the past month or so as I new moved to a new place and I'm having a moderate success rate of fucking on the first date (5/7 girls so far).

My plan over this year is to try and get better at cold approaching and start small with a couple of cold each day, but in the meantime tinder is a building block.

Problem is retaining the attraction after the first date - I'm having a hard time getting these girls back again, only two of them I've seen again. Maybe I'm not assuming enough self-worth by messaging them after?

Would like to hear your advice on what to do after first date.