I've had young plants smell really strong! Some do, some don't. They're going to stink even more in flowering, so you might as well get the odor under control now!
If it smells like weed or leafy, all good. I notice it most just after lights out ( or did before I had a carbon filter). If it smells rotten, you could have an issue like root rot.
CARBON FILTER! period. yes it is normal for weed to smell in veg. Not all strains do but the ones that usually do can turn out to be stellar! Personally I love that weed funk. But I love my carbon filter more!! Why? It has kept me out of trouble and helps me maintain stealth. ( Closet Grower)