Been smoking ed since the age of 22ish.
Depends on the person, type of weed.
I don't get the munchies no more, no matter what kind I smoke. I smoke it more to just relax and not worry about shit. CAn't sleep without it.
Try it, see how you react to it.
For most, it's not a good idea to smoke before the gym. I do, but have stims to overpower the potential lazy side of it. And if you smoke before the gym, make sure you're standing and stay standing for obvious reasons!