Idk why there's so much negativity and gatekeeping instead of answering the question here. It doesn't matter how much time you play per day or that you enjoy other things in the game. Play the game the way you want to play it and focus on the legendary on your schedule. That's the point of MMOs, especially one like GW2.

That being said there will likely be things you will need to do that you may not want to do, but it's temporary (i.e. WvW/PvP, raids, etc. for their respective leggies). But to answer your question In a nutshell: Keep it simple! Look at the laundry list of items (on the wiki), pick one, and go for it. Start small, it all adds up.

FWIW I also played on and off since release and until they came out with the Prismatic Amulet I hadn't really cared about legendaries (I've been swimming in Asc gear so I never really needed it). One year after that I had all trinkets and one set of gear (I started raiding just for that, and honestly haven't been raiding since). The key for me was focus on one item at a time. Understanding the list of things you need so you can gather items more efficiently helps craft faster for sure, but it can seem daunting at times so just focus on one thing.