Do you mean just trimming everything from like the bottom 8" of your plant? Many will do that, but not if your plant is very young.
If you're only a couple of weeks into veg, and you're a first time grower, I wouldn't cut anything. Right now the plant needs all its leaves to keep up with the forced 24 hour growing you're making it do. Those leaves are creating & storing sugars in the fan leaves right now that they will access when it comes to flower.
After you're a week in to flower, if you want to trim the bottom of your plants, do it then, and root the cuttings. For now, I would suggest you just let them do their thing and not cause any undo stress in your first grow.
Good luck.