Stick to the big lifts. 3x a week is fine. I'd recommend dumbells to avoid imbalances that can happen with a bar.
Example with a focus on Ancillary "beach work" for arm size. All 3x8+. When you get to 10 reps, increase weight and try to hit 6 reps mininum with the next weight up. If you cant, drop down weight. Once up to 10 reps, increase weight again.
Monday
Bench
pullup
Squat
Ancillary (curls, tricep extensions, rdl)
Wednesday
Ohp
row
Deadlift
Ancillary (curls, tricep ex, glute bridges)
Friday
Incline bench
Pullup
Lunges
Ancillary (curls, tricep ex, light squats or cossaks)
Just an example. Keeping it simple and consistent will get results as long as you go near failure and keep bumping weight up within that 3x 6-10 range.