Should i start fin/min 33 y/o long hairs, mostly covered, Turbaned guy

Hi
I have long hair, but losing hairline and loosing crown hair at faster pace. In the past i did not think much because my hair are mostly covered but now I am taking it seriously. Please help.

What should I do? Should start fin/min or dut/min?
Which and where to buy? I am in North America region.

Read the beginner’s guide and check the product finder.