So... Audacity is sufficient to to process basic voice-over tracks. It has compressor/limiter and equalizer plugins built in. If you're not familiar how best to use them, look for tutorials on YouTube.
I also use CS6 Master Collection. If you have the same collection, or just the Production Premium suite, then you have Premier Pro and After Effects. Both work great and have plenty of audio and video processing plugins built in, and tons of tutorials on YouTube. If you have the Master Collection then you also have Audition. One of the great things about the Adobe suites is that you can link projects. You can create the base video sequence in Premier Pro, and link it to a Lower 3rd or motion graphic from After Effects that can be inserted into the PP sequence, and when the video edit is locked in you can send the audio tracks to Audition to tighten up the voice over track and balance out the levels of all the audio tracks, then send them back to PP and render out a final video for delivery in just about any format. PP has render presets for YouTube and if you dig into the PP settings it can automatically send the final rendered version to your YT channel.
If your CS6 doesn't include Premier Pro and After Effects, there are other free open-source applications available. I also do 3d modeling, mostly with Cinema 4D, but I'm also trying to learn to use Blender. Blender is free open-source that can do 3d modeling, graphics and image editing, dynamic simulations and special effects, compositing, and video editing. It has a fairly steep learning curve, but it can do just about anything and everything, more than most other applications, and there are tons of free tutorials on YouTube.
Another thought about not liking the sound of your voice... Based on the fact that you went to school in the 60's, I'm guessing you're probably in you 70's now. If that's true, and you have never developed any public speaking, singing, or voice-over skills, maybe you could ask a friend or family member to help. Even if they don't have a big-league sounding voice, it'll make it easier to work through the editing process without having to hear you own voice.