I hope you have seen 5-10 people in person who have had it done, and ideally ones who have it for 4-5 years at least.
On the persons instagram page you mentioned, the ones that look ok to me, are the ones where they have diffused thinning. Then they just fill in with SMP dots. The ones where they're slick bald, look like tattoos, and in quite a few cases very straight, obvious looking tattoos.
I think SMP is really, really difficult for white guys who are slick bald to pull off, 99 percent of people just don't look right.
It's a big decision. I hope you have thought it through. It's very difficult to get SMP tattoos off without leaving hyper/hypo-pigmentation whatever they tell you.
Good luck whatever decision you make.