I also tried a hair system at 23.. I have to say it was a nightmare to maintain. The glue/tape was a total pain and I was very limited to what kind of styles I could go for. Personally I had a hair transplant at 25, I don't regret it.
Hair systems also damage follicles under your head, the concept that your scalp is able to breathe through a hair transplant is simply a myth.
Do what you believe is best, I personally think younger people such as ourselves can get transplants assuming we remain on finasteride.
Rooting for you friend!
(References)
Hair system at 23 (I could never style it up since the front was so obvious, people pointed out the color difference between my natural hair and hair system hair in the sunlight.. it made me feel more insecure with it. )
Natural hair (dyed) at 24;
Hair transplant design at 25;
2 years after hair transplant (22 months result);
Full thread here;