I joined nearly 2 years ago (2017), and I remembered getting an invite code for free on Deviantart, but I don't know where on this site I got it from, though. 2018, however, is when I started to become more active.
The site didn't change that much to me, though since then, the updates to this site became a lot more generous to me. I don't really remember any TH moments though. I only go on hiatus when I'm on vacation or stuff like that, but otherwise, I only do it ocassionally.
The first character that I ever uploaded to this site was Ruka, who is now retired, alongside everyone else that I uploaded during my first four months on this site. At first, I'm only limited to creatures, but as time went by, I got more interested in humanoids, and my designing skills improved as well.
I joined under the username "AORIMARU" (Named after my former sona), I had undergone several username changes, and after changing my username to "Historia", I haven't changed it since.
To expand on my post:
Most people seem to recognize me as "the person who always use Lilina from Fire Emblem as her icon", but prior to February of 2018, I didn't know who Lilina was, up until the point when the Love Abounds banner in Fire Emblem Heroes went live, and I desperately summoned multiple times just to get LA!Lilina until I finally got her. I didn't summon the regular version, until two months later just a few days after she got her (Really good) weapon refine. Back on topic, Lilina became pretty much of a staple to my account.
Since I'm mostly active on the forums, I got more into it, and became one of the many forumgoers/regulars on this site.