New to recording, mixing & mastering

Hello, long time lurker at GN here, finally decided to join.

I've been playing guitar & keyboard for a few years and decided to get a recording studio last Christmas, it's the Tascam DP-01 FX. I don't know if anyone knows the features of this but they are listed here http://www.soundonsound.com/sos/apr05/articles/tascamdp.htm and http://www.tascam.com/products/dp-01;9,16,33,16.html

You can mix and master on it but I was wondering if people believe it's completely adequate for these jobs. I've used audacity before and liked how simple it was to 'nudge' tracks and 'clip' them but was wondering if this was possible on this model, simply.