How to Export on Audacity (MP3 or WAV File Format)
This is a video on how to export on Audacity and what is the main difference between MP3 and WAV file formats. Also, watching this video I realized it sounds as if I am advising not to use 'save project', which is not the case. I suggest you save your project and then export your audio.
I've heard some good stuff about this web: https://voiceovertip.com/ check it out :)