Strength / Weight Training

I'm 6'3 and 86kg I'd like to put on some proper muscle and get up to 90 and get stronger.

So a bonus side effect of furloughed lock down is I've started doing some strength training. Just bodyweight stuff. With http://www.startbodyweight.com. Any of you lot done this?

I like it because it's geared towards building functional strength. I'd like to be able to eventually do a muscle up and a human flag (though that's a long way off, I haven't got through to a full pull up yet though I can do chin ups.

Obviously I would like to look hench too! It's also pretty straight forward and clearly marks out the progressions.

It involves:

Dynamic warm up

3 sets of between 4 and 8 repetitions adding a rep each session then you move to the next progression

squat progression
 pull up variation
handstand push up variation
leg raises variation
   push up variation or dip variation (alternate between the two with  every session)
   horizontal pull variation
plank variation

Static stretching

I've also added on chin ups to the end. It recommends training 3 times a week but I've been doing every other day is this detrimental? I thought a days rest between each should be fine. There seems to be conflicting opinion out there.

I started 6 weeks ago and I've noticed a difference in my chest and arms. Though I wish I'd taken some before pics.

I've also started taking whey protein as I don't think I was getting enough at all in my diet.

Any advice appreciated.