25M. Should I start with just fin? Is waiting until July okay?

M 25 here. Started shedding at 22, was in denial about it for 3 years. Very anxious person and I’ve gotten my anxiety worked out a lot these past few weeks and am now open and okay with taking fin to keep my hair .

Anyways some of these miniaturized hairs (I just combed them down in pic 2) around my hairline, would they thicken back up with fin? Theres smaller ones too which you probs can’t see with a camera but would have to look up super close.

Have doctor appt in July to see dermatologist specialist (someone who knows what they’re talking about when prescribing this stuff).