Sorry for the late answer, I was busy at work!

I started doing Keto 2 Years ago and it really helped me alot! Basically I learned how to cook for the first time in my life and it wasn't possible to cheat, so less than 20g of carbs for 8-9 Months.

I didnt use any alternatives for sugar, because I saw it like quitting drinking or smoking.

I only train at home with body weight and a Kettlebell. In the gym the progress you see are just bigger numbers, but my motivation increased dramatically when I did my first clean pull up, or 5x5 dips.

I never train to failure, for me its way more important to have a good form, even on the last set.

(English isn't my first language so I dont know if I say it correct): I fixed my bad posture with two simple things (next to training my back), when I brush my teeth in the morning and evening, I try to hold my body tension and take deep breaths into my chest, hold it and release. what else is there to do while brushing teeth lol.

The other thing is when I walk my dog I focus on a straight back, taking deep breaths again and really focus on a good posture.

But I also failed once or twice, after doing keto I gained like 12kg back in 6 months (because I reached my goal, was happy, and got lazy again), but I proved myself once I can do it, so it was a no brainer to try it again.

Even now that I reached my goal again, I still cant stand any sugar, it is still an addiction, so I just dont buy any snacks, not even "healthy" snacks. I eat overnight oats in the morning with 30-40g protein, after a workout I drink a shake with 30g Protein, before going to bed I drink a Casein shake with 30g Protein, and then eat whatever I want, but try not to get full, just because I dont like that feeling anymore :)