You can start when ever you feel comfortable. So yes, you can start masturbating if you're having wet dreams.

Depends on how much time has passed since the wet dream and how fast your sperm is reproduced. But i guess you will be able to ejaculate.

Probably. Depending on how long it has been since the wet dream you may ejaculate more or less. The same goes for masturbating - if you masturbate several times a day you won't get as much out each time as if you were to do it only once/day or even a couple of times a week as you're giving it less chance to build up before emptying it out.

It does feel slightly better if you ejaculate more but most of the intense pleasure is in the orgasm which you get however often you do it and if you wait longer between sessions you're enjoying fewer orgasms You just have to experiment and work out what frequency you prefer.

As for whether now is the time to start, I would if I was you. You may find your wet dreams become less frequent or even stop, or they may not. But masturbating means you're completely in control and awake to enjoy the orgasm.

That’s when my brother started

for quite some time you will be disinterested in doing masturbation immediately after wet dream..after some time you can do it and ejaculate as much as you do in the normal time..idk about girls after they getting wet in the sleep..