@mstub When I (M) started working out I weighed 130 wet. It took 2 months before I started to see obvious and faster muscle growth. Make sure you are eating enough carbs, fat, and protein. It was hard to eat enough to give my body the strength it needed to heal, I tried to eat healthy and lift at the same time but I think it held me back a little. Add supplements like whey, one at a time to see how you take to them. Protein is is simple and easy enough to calculate and find. Creatine is something you should research for yourself.
One thing I think didn't click for me immediately, but I wish it had, was that these exercises were meant to build my muscle so I should really be focusing on the muscle working during the movement.
In other words, the pump and the negative pump, were not something I always focused on. Sometimes I would just want to do the movements and move on.
But for this to matter and make it worth your time, make sure the speed is not fast and the movement is made with intent for each exercise. Focus your mind on the muscle that you are currently working on. "Feel" the pump.
I added creatine, protein, and pre-work outs once I got into a repeatable habit, and my physique flourished. I did hit a plateau at a weight of 165, where I was benching 235 for regular sets, and couldn't gain any weight or increase my lifts, but I was fit for a little while there while I had my good habits. It was always a fight to feed my body enough for the exercise I was doing. Don't give up.