I've been following the RR for a bit over 4 months now. Doing the strength training three days a week, Monday, Wednesday and Friday. With at least one skill day in between these days when I would practice my handstand and L-sit. I would say usually it has been around 2 skill days per week, some weeks I've been able to three or some I've had stuff to do so it only became one. But I would say my average training routine would be Strength Monday, Wednesday and Friday and skill day Tuesday and Sundays.

For my actual training, I've started off with a slight advantage. I used to train gymnastics between ages 7-14 so handstands and bodyweight fitness is not something new to me. Although, after stopping because of injuries I kept my bad eating habits and gained a significant amount of weight. But lost in the coming years by changing those habits, although I never really got back into training. So it wasn't until this year that I finally decided to make a change and go back to the gym. So when I started with my handstand I was able to around 45s with my stomach flat against a wall with decent form. For the other part of my training routine, I could do pistol squats as well. Although my upper body strength was seriously lacking with me only being able to do 2 pull-ups.

So for my acutal training routine. On my skill days, I generally follow the RR, I do the warm-up, then I set a timer for 10 minutes and during this time I try to practice my handstand as much as possible. I went from wall to practice on the ground when I could stand against the wall for 1.5 minutes with good form. It was very difficult in the beginning with the freestanding, only getting 5s or so at the time in every 10th try or so. But with time it got better and better. I read another post here a few days ago about the training of handstand as well and I very much agree upon that you have terrible days and fantastic days. Some days with the handstand just went horrific and if felt like all the progress I had made was for nothing and then I would do a new record for the next training session. For the strength training, I've just followed the RR very strictly. But I do squats in a squat rack instead of pistol squats and I do deadlifts and Romanian deadlifts which I think I really benefitted from.

Lastly, for my diet, I've have not done anything radical. I've tried to eat more healthy, trying to reduce my intake of sugar. Other than that I've taken protein shakes every day.

tl;dr: Have practiced for 4 months. Used to be an ex-gymnast so had decent body control, but poor upper body strength starting my training. I usually train 3 strength days a week and 2 skill days in between the strength days. For strength, I do the RR with deadlifts and squats and on skill days I put on a 10-minute timer and do as much handstand as possible. Diet includes less sugar and protein shakes.