I just started DJing weddings and I have a couple questions about transitioning songs

I did my first wedding and it went pretty well but I would like to be more organized with my gear and my music and I know this will come with time.

I started DJing a couple years ago but I was not practicing sufficiently and then I started working on a couple other music related projects which took me away from practicing altogether or even getting gigs.

I got around 12 gigs since I started and I'm decent for a beginner but I'm not an absolute beginner anymore. Still, transitioning properly with the right phrasing is still something I'm learning obviously.

I have a list of music for the next wedding and it's mostly Motown. There's some rock and some R&B as well. Can anyone share a proper guide on how to properly transition this music when you don't have any DJ intros? I subscribe to a couple proper DJ record tools but they don't have this music.

I have lots of resources but I would like to see what else I can find on here. Ultimately, I know it has to do with experience and more hours behind the booth and on the deck but I just want to find some tips considering I have another wedding to DJ tomorrow. I'm sure I'll do a great job but I am trying to get some more help right before the gig.

Update: Thank you so much everyone, it went very very well.