What kind of clothes do you need to make? If you intend to use them in a still or static shot, then I guess you can hand sculpt the entire clothes. But if you intend to use them in animation, then you’d need to make them using cloth simulation. And what do you mean by seams?
I know this is absolutely a self promotion, and I don’t usually do this nor do I like to do it, but if this is what you’re aiming for, then you can follow the link included in the OP to my Youtube channel, and find the ATATSC playlist.