If you can lift more reps, you can go to the next weight level. It's basically linear progression with a self-reported knob. My experience is that everytime I use creatine and start training after not training for like 3 weeks, I put on about 3 kg in a very short time. The rate of progression is deff connected to the quality of my sleep and the amount of protein I consume I did not follow as closely how much creatine impacts, but I think if it does, it does marginally compared to the others.

Still, this cohort might suffer from the issue of lack of awareness about _how exertive_ the actual workout is. I feel this is also something you should learn.