Just Another 18 Year With Some Questions

[Notlikethis0]

So I have been lurking hairloss forums for a year. Since then I started to monitor my hairline. I have not noticed it move in that amount of time. My mothers side of the family has extensive hairloss, as my uncle and grandpa are both bald and only 2/5 of my cousins have not receded. My fathers side has some hairloss but never actually go bald, the worse it ever gets is norwood 3ish. The worst part is that both of my brother are actively losing hair. My oldest brother started losing hair by 16 and was a norwood 3 with crown thinning by 18. My other older brother was around 18 when noticed he had some temple recession and diffuse thinning?
Is my hairline normal for my age or should i start being proactive because of my family history?