If you are considering a hair transplant surgery, it is best to see a doctor in person for a consultation.
Once you believe that you can benefeit from a hair transplant, you now must select the right doctor. See video below
Without seeing you in person, or at least seeing some photos or a video, I can't really advise you other than to say that the single most effective treatment for male pattern baldness is the drug finasteride. The combination of finasteride + minoxidil + low level laser therapy would probably be even more effective.
It's important to understand that medical treatment could be "effective" even if you don't actually see a difference in your appearance. You say you have lost a noticeable amount of hair in the last 5 years. We have to assume that you would continue losing hair over the next 5 years if you didn't do anything, and that you would see the difference; so if you take finasteride and DON'T see a difference, the drug has probably been effective. If you see some improvement in your hair loss, that's a bonus.
You should try to find an experienced, ethical hair transplant surgeon who can meet with you in person and tell you if you are a good candidate for a hair transplant, and explain the pros and cons of the FUE ("strip") method of donor harvesting vs FUE.
Thanks for your question – I hope my answer has been helpful.