I really want to help, but I have a living outside RO..
What I gather from your post is that you have no real idea what you are doing, but you want to learn "the good sound" with
next to no budget nor gear and hardly any self-studies. I know, this is the Home Recording section of RO. But, can you Google?
Noise gate - Wikipedia, the free encyclopedia
I think, it would be much more efficient to learn all the basics you need and then come here with specific questions where you got stuck.
This job is a never stop learning profession. It takes years to get behind the trade. Audio schools or reading and self-studying is the only way, along
with on-job-training that gets you somewhere. If you want to do it post-by-post through a forum you should have Highlander gens. It will takes ages and
the information you gather will be partly flawed.
Go to a music store and buy a good book on recording... Safe money for gear, recognise that the cheaper way is to go with a DAW software, eventhough
I personally miss my console everytime I start mixing...
DAW key-turn that works 5.000 $, Console and outboard FX eqiv. to a DAW 30.000 $ +++ (excl. monitors and mics, of course)