Getting wedding ready

My wedding is in 9 months and I want to try and look as good as possible. I’ve dabbled with weight lifting before but nothing serious. I don’t have a ton of muscle to begin with (I would guess my bench max is around 155, squat 185, deadlift no clue). I would say my body fat % is around 20-25%. Male, 5’8”, 165 lbs

What would be the best way to do this? Try to eat in a surplus to gain muscle for a few months before lowering to a deficit and try to get lean? I’m not expecting to be an Adonis in under a year, but to get sub-20% bf would be nice. But without building some muscle first I’m not sure it’ll make a difference.

Also what routine would you recommend? There’s so many out there. Would you add cardio? I’m a resident and walk around 5k steps per shift at the hospital.

I appreciate the advice