What kind of mixing are you doing? How many instruments/vocals/channels are you recoding simultaneously and how many channels are you mixing?
The biggest challenge with “home recording” is getting a good-quiet recording environment to approximate a soundproof and sound-absorbing studio.
It can be a “big topic” and I’m pretty sure you can get a book on mixing… A book might be better (more organized) than randomly looking around on the Internet
using a Steinberg Cubase as a preamp to record. Just would like to tweak it a little.
Cubase is software and it’s actually “better” for mult-track mixing, but it’s a LOT more complicated than Audacity.
I assume you have a Steinberg USB audio interface? Do you have a good microphone?
Equalization is mostly a corrective effect. i.e. If you’ve got too much bass or the highs are too strong, etc., you can EQ it, etc. The exception is that the deep bass is usually filtered-out from almost everything except bass guitar and the kick drum because with most sources the only deep-bass sounds are noise. Then of course, it’s just human nature to tweak everything!
I like to start with the philosophy that a good recording doesn’t need ANY effects or processing, but in many cases that’s an unrealistic ideal and the only professional recordings that are made that way are classical music and maybe some other “acoustic” music. And in the real world, even pro classical recordings are processed.
Then of course there can be special effects (unnatural effects) such as echo, or other effects used “creatively”.
Mixing is mostly done by ear. For example, if you’ve got a good guitar track and a good vocal track you simply adjust the relative volumes 'till it sounds good and you’re done!
When sound guys mix live they mostly just set the mixer levels to get a good balance of the sounds and then they let the band “play together”. (In small venues a lot of mixing happens acoustically. Even if there is a mixing board, a lot of the drum & electric guitar sounds, etc. comes directly off the stage. Often drums & amplified guitar don’t go through the mixer & PA system.)
With modern studio recordings it gets more involved and the engineer uses [u]automation[/u] to adjust the levels of all the tracks throughout the recording (as needed). I’m sure Cubase has automation and Audacity has something similar called the Envelope Tool.
And if you have enough tracks, the instruments are panned across the stereo “soundstage” with lead vocals & bass toward the center and the other instruments “located” left-to right across the stage. (Bass is “hard” to reproduce so the bass goes to the center so you’re taking full advantage of both woofers.)
If you just have a guitar & vocal, mono (or both tracks centered) is usually the most natural. Or if you want stereo you can double-track the guitar (record it twice) and pan one track to the left and the other to the right. (For natural-sounding double-tracking it’s important to make two separate performances/recordings.)
It’s also common to use some compression & limiting to even-up the volume and to bring-up the overall loudness (as necessary) without [u]clipping[/u].
The last of the most-common effect is reverb to simulate the sound of a “good room” (when the recording is made in a small room or sound-absorbing studio).
Note that mixing is done by summation. Hardware mixers are built around a summing amplifier. That means you normally have to reduce the levels to prevent clipping. Hardware mixers and DAWs (such as Cubase) have level controls for each track plus a master level control. Audacity doesn’t have a master-mix level control. With Audacity you can reduce the levels before mixing and/or export as floating-point (which will not clip), then re-open the floating-point mix, normalize (to bring down the level) and then export again in your final desired format.