Hey Dylan,
Unfortunately, PPro doesn’t offer that many options when it comes to audio. In regards to your question, though, you are able enlarge your waveform by “unlinking” your audio file from your video clip. You can do this by right clicking on either your audio or video clip (since they are linked) and then selecting “unlink”. This separates the two files and makes them two different entities. Once you’ve done that, simply highlight your audio clip and go to “source”. Your source is the tab to the left of your Effect Controls. You should see an enlarged waveform.
I am unaware of a way to split the audio tracks : /
Like I said before, PPro isn’t the best place to edit audio, I use Adobe Audition for that.
Hope this helped!
Z