18/19 tops. Nobody who has lifted for more than a couple months would not know some of these basic things. Everyone is looking for the easy road.
OP, no disrespect at all. Lift heavy, eat heavy, and watch you grow. I've been lifting for a couple years and I know I'm nowhere near where my body will take me on its own. I give it a little boost here and there, but I know that when I train hard, and put in time tracking my diet (calories, protein, fats, and carbs), and know exactly what my goals are, results ALWAYS follow.
Go get a nice beginner's routine, read some diet stickies, and see what happens. You won't believe what you're capable of...I assure you.
I'd say good luck, but luck ain't got shit to do with it. Work hard mf!!!