I would go for it. Floors and trunk are very easy and this was the first thing I started learning on. There is some time involved like mentioned, but if you are halfway decent with a mig, I would give it a shot.
Maybe if you feel comfortable enough after the floors and trunk you can tackle the quarters.
One thing I had to get past at the beginning was having to trim and cut up the brand new pieces, they all need work to fit just right.