Met a girl off tinder, had sex with her, went on a few dates and had sex again. We talk casually online.

The problem is my game is pretty weak. For example, i want to have sex with her again but the problem is i asked her what she is doing Thursday she tells me she is having dinner with a friend but happy to do something after.

The thing is i don't know how to play this. Do i pick her up go to a park (where we have done it before) talk for a bit then initate it? do i ask her over message first let's go to the park and fuck? should i take her out for a drink first or something? i mean what's the best way to get her in the mood? i feel like last time we had sex she wasn't even into it. How do i get girls in the mood?