At 19, you must be conservative...that can't be stressed enough.I've never used a piece but I imagine that its a pain. With your first HT, u should address the front and mid sections of the scalp but you need an expert doctor to decide where your hairline should be placed and how many grafts you'll need. At 19, you probably want to re-establish a hairline which hasn't matured yet, which is unrealistic long term. Get on meds, and see a coalition doctor..then do your research on this forum.