this workflow tutorial from the manual should help you: http://manual.audacityteam.org/man/Samp ... gitization
It's part of this set of tutorials: http://manual.audacityteam.org/man/Tuto ... iscs_to_CD
Personally I don't manage metdata in Audacity (apart from the track names). I export WAVs for conversion in my iTunes library and I find iTunes easier to use to manage the metadata.
Why MP3 192? Storage space is relativley cheap these days and uless you have a small disk-size MP3 player you will get better results with 256 MP3s - and I would use VBR rather than CBR if your payer supports it. I started out with 192 as a good compromise between quality and disk-occupancy size when I started out with a 20 gig iPod. Now that I have a 160 gig iPod I now use 256 (I use AAC rather than MP3). My ageing ears can still hear the difference (on good headphones or speakers) between 192 and 256 for music, though I struggle to hear the 256-320 difference. I still use 192 for spoken word recordings (which live on my old smaller iPod).