I would add in some strength training, Squats, push-ups or bench press or chest press machine, and shoulder press.
The compound movements like these develop multiple muscles on the body and having more muscle on the body, will not necessarily make you bulky right out the gate because what tends to happen is you will tighten up the muscle that you have before increasing the size of them.
That being said, as the muscles get stronger they will burn more calories long after the exercise is performed potentially burning more body fat.
I practiced bodybuilding years ago and made it to a lean physique with a four and a half pack of abs and it got the job done for me at that time, now Im a few months away from age 40 and want to be better than ever you know.
Just wanna be better and sometimes well used to be upset at what ive become but kinda put those thoughts away cause it could just keep me in the past and we going into the future baby :). Not calling you baby, just some silly talk on my end idk.
Sharing what I know worked for me from what I learned and experienced, hope you stick with this IF stuff. I hope to for life.
Oh and to answer the question on fatigue, I work a physical job in construction materials and fasting until the first half of my shift and eating time is at 2pm or later right on my lunchbreak and throughout the day Ive found that being hydrated from water as much as I can, even if I gotta find a bush to pee in while on the road, keeps the body functions going and regular as far as using the can/potty. Focus on drinking plenty of water while fasting, then when its eating time you could taper off on drinking so much water so you could have room to eat.
18:6 daily for me, one scheduled 20:4 from Friday into Saturday eating from 4pm to 8pm.
Haven’t noticed decreased stamina while fasting.
This 64kg plateau your feeling is b/c homeostasis has decided that 64kg is your normal weight and it’s trying to keep you there. You’ll reset this “weight thermostat” by increasing energy output during your fasts and occasionally throwing a long-fast into the mix.
I’ve every two weeks I fast for 48 hours at a time. Feels great, again, no stamina issues. Keeps me from plateauing.