My Experience with the Source Engine

For about a year now, I have been mapping and modding on the Source Engine since January 2024 so for 2 years.
I got into Level Design back in September 2020 when I was into Mario Maker 2. I made alot of Levels that are available
with the Online Subscription on the Nintendo Switch but I can't write the creator code here because I don't have the online
anymore so yeah. Fast forwards to January 2024 and I started being interested in mapping for Source Games like GMOD and TF2.
The first map I would make on Garry's Mod was called "gm_laboratory13" which was a very simple, blocky and ugly map that really tells that the creator is a fucking newbie.