How much time between practise sessions?
Practice if you want to.
Don't overthink it.
Have fun. Don't turn it into work.
Practice the short game as much as possible. Chipping, pitching, putting. That's where you will shave the most strokes off your game. Want to break 100 or 90? The short game is what will get you there.
Just keep the ball reasonably in play off the tee and to the green and then chip, pitch and putt. Unless you are a fanatic, spending hours on your long game, you will likely hit many off target shots. So you must have a good short game. Even the PGA pros mishit shots all the time.
What I used to do to practice chipping is take my wedge and putter and one ball, toss it down off the green and chip it to the hole. Putt it into the hole. Toss it in a different spot, repeat. Great for developing your touch around the green. Hopefully you have someplace to do this. Not all places allow this.
Obviously have a consistent chipping technique. Get proficient with your pitching wedge. Master the wedge and putter.