First time OFM

Hello everyone, today is the first time I tried OFM and surprisingly it was a success even though it took longer than usual. Generally I last around 3 to 5 minutes, but for my first time trying OFM it was around 8 minutes. And it feels great still horney. Will the time reduce gradually?

I'm still exploring different techniques and since I always use my left nipples. My left became sensitive and my right is regular, is it normal??

For now I'm focusing on cumming only from nipple play(is it possible, if yes I'm looking for advices and techniques).

Thanks in advance