Well... that was some good detail, Kerry, and a useful list of possible edits. It's a big subject, no? Ultimately, yes, it's a matter of addressing each point in the audio track that you want to improve on, and doing what's needed, spot by spot by spot. As with most fine things, there's not many really quick fixes on the road to nailing professional results, for the most part. Also, there are many other possibilities available with pro editing gear, that just what's been suggested, as some of the finesse, filtration and manipulation abilities in the really upper-crust systems need to be seen/heard to be believed. However, without that level of gear and the skill to operate it professionally, there are going to be spots where unsatisfactory compromises will be made, either through equipment limitations or just user skill level. It's a chain of results, with each step impacting the rest of the project. In the industry, there's the "Good Rule"... good gear, run by a good tech with good ears and a good idea of what is needed, recording a good performer with a good source in a good space that provides a good performance which is properly recorded and mixed by a good engineer into a good format... is good. Everything else, is less than that. Pro gear, is pro gear for a reason. Likewise, consumer gear. Beyond the gear, editing itself is a skilled art, not just a few generic computer operations.
Just for the record, in the scheme of things, no, Audacity isn't even vaguely pro, and no, most laypeople don't really know what professional level editing really involves, or can involve, or the value of a truly experienced ear and skill set in the process, though most folks with a computer figure they can do the job. Technology and appearances can be deceiving. It's a rather deeper rabbit hole than most would surmise.
So, given the large edit list posted, if you're up for it, go for the details and fix things up. If you don't feel like you want to tackle this yourself, I'd be happy to help you though getting things straightened up, even if it's just a few of the especially frustrating bits, or some critical listening and coaching.