@Lost Boy take my advice in this case and try one thing before you escalate up to hair systems.
Try Dermatch or try Mane. Don't even go for the fibres yet, because I really don't think you need them just yet - you might in a couple of years, but not yet.
Dermatch applied to your scalp AND to your hair will make your hair look thicker right away.
Mane is like a black spray, which you can apply to wherever you have bald patches or thinning hair. It is sprayed into the hair but aimed at the scalp. In some ways I preferred using this because I didn't need to rub it in like with Dermatch, i.e. the rubbing can cause increased hair loss.
In my view both will give you visibly better results instantly. Mane is actually longer lasting and will stay on you longer than Dermatch. You can also use hairspray on top to make both of these last even longer.
Fibres are a mess and a pain, but still a natural step to take after Dermatch/Mane, and before hair systems.