General Fitness

[Grim]

Any tips on how I could start? btw, I'm just looking to lose fat/better cardio

Start running. Jog normally, as you would, without any added exertion and see how long you can go without stopping. 10 minutes, 15, it doesn't matter. After you find out what your wall is, work on breaking it.

There are a couple of programs on the internet which can get your cardio exercises organized, much like hundredpushups.com does for your upper body ones.