Karen – Just to hit a couple of points that have been brought up.
FCP (formerly X) is a great option, but an acquired taste. After an adjustment period, some people love it and others never adapt. There are plenty of “FCP for Premiere editors” YouTube videos. I think you can get a trial and check it out.
Unfortunately there are a few things that you may need to buy to augment its capabilities, depending on your needs. However, there’s a large and growing ecosystem surrounding it. FCP does not transcode everything to ProRes. You can if you want to, but FCP handles many native media formats quite well. In fact, far better than Premiere.
Media Composer is also powerful and no issues for an individual user. Like the ProRes issue, you do not need to transcode to Avid DNxHD/HR as in the past. You can work with “linked” media, though it’s not recommended by many editors.
If all you’ve ever worked with is FCP (classic) or Premiere Pro, then MC, too, will take an adjustment period. There are, however, quite a few features that surpass FCP or Premiere, like built-in tracking. Other, like PhraseFind and ScriptSync are extra-cost options, but there is nothing comparable in any other NLE. To be sure, MC is more of a straight editing NLE and less of an all-in-one application.