There are a few things that have nothing to do with recording technology per se, that will make a lot of difference in the sound quality that you get.

The business about the ambient noises, AC, fridge, etc is important.

The first thing that you must do, however, is plan out exactly what you want, in terms of verses, refrains, measure for measure, counting intro, outro, breaks, and vocals, figuring tempos and dynamics--Then you have to play it through til you have you basic track down so that you can play it, exactly like you want, every time you want, with no mistakes. Then, and only then will you be ready to record it.

If you are multitracking, you need to have a click track(which is a metronome track), and you need to learn to play to the click track. You also will need to learn to perform each of the separate parts as I mentioned above--

Planning, rehearsing, and performance are more important than the sophstication of the technology that you use--when you get it down right, you can use technology to enhance and refine it, but if you don't get it down right, all the technology in the world won't help you.