I've been modding WoW since 2011 to early 2020, focusing exclusively on 3.3.5a. I consider myself to be level designer/environment artist, which means that I am not dedicated programmer nor data miner.
You can find my YouTube channel with many tutorials focused on 3.3.5a modding here.: https://www.youtube.com/AmarothEng
Note that I quit modding and apart from me forgetting things and not having tools nor dev server installed anymore, many things may have changed since I quit. I may be able to help you if you get in touch on Discord Amaroth#9907 or my YT channel, but I should be the last restort if help with WoW modding is what you seek.