'05 Aveo Hatchback- is it a lost cause?

I bought my '05 in October 2019 and I swear that this car hates me. In the short while that I've had her, I've replaced my radiator, alternator, o2 sensors, purge and vent solenoids, air filter, gas cap, general maintenance fluid changes etc. At one point on a busy highway, my gas line just.. fell off my engine- this car has homicidal tendencies. I originally had 7 different engine codes, I've got myself down to three.. lmao. I've got a new engine valve cover gasket on the way as my engine is covered in oil- should be here soon, thankfully!

I'm running into p0507, p2279, and p0463. It seems like my p0507 and p2279 might be connected, but I've got no idea what to do with the p0463. This is my second vehicle, I know little to nothing about car repair or maintenance but I've been trying to learn through this forum, repair manuals, and Youtube videos. I'm wondering if it's even worth it to try and repair this vehicle? It seems that every time I fix something another thing shows up. I intend on trying to keep her running for another 2-3 years while I finish up university but I'm not sure that she'll keep running for that long.

Thank you!

If your fuel gauge seems accurate, I wouldn’t bother with the p0463.
if your rubber air snorkel that goes from your air box to the throttle body is cracked or split (common issue) you can get the other codes. Dirty throttle body can also give one of the codes.

It's accurate for the most part! I will sometimes be driving and it'll bounce up and down- I left the house with 3/4 tank, it dropped down to say I had 1/4 tank, restarted the car and I was back up to 3/4. It's annoying but I think it should be fine.
Thank you, I'll have a look into both of those!

If you really want to fix the p0463, it’ll probably need either a fuel pump (with float level) or a new fuel gauge.....or just know how much gas you actually have.