@L_I_S no offence... but u look pretty dam skinny
i find it kinda strange that u know all this stuff but ur not big 
It's fine, I've been training for like 2-3 months and reading for 5 months. I am not skinny any more anyway. I was 66-67kg in my freestyle videos and now I'm 73-74kg which puts me well into the healthy weight class range.
Size =/= strength. It's possible to train your muscle to become stronger and not become much bigger. My friend is at 67kg after 1.5 years of working out. He can bench 1.4bw for reps but he still looks almost the same.
Look up: myofibrillar hypertrophy vs sarcoplasmic hypertrophy.
It's up to you who you want to listen to. I made sure I was well educated before I even touched weights.
100 kg squatListen to the guy that's been training for years and does his squats like this. His squats are probably lower than his bench press.
He probably took a lot of lessons in 'broscience' too

"Bro, if you wank you'll lose all your muscle gains"
"Bro, if you do high reps you can tone your muscles up"
"Bro, do crunches if you want to lose fat around your stomach area"