Should I Try To Make This Happen?

Sell appliance 2013 Mazda3 with little to no loss and transfer to this amazing condition 1990 Volkswagen GTI 8v? It's been up forever.

Why I'm stupid/crazy enough to do this... (A.K.A. my wants)

1) Car with "personality" (Appliance cars feel dead inside.)
2) Satisfy want to be a gearhead and actually understand how cars work.
3) Better driving experience. (I'd test drive to verify this of course.)
4) Have full rights in no more than a year to call this my car. (With the 3 it's going to take a few years.)
5) Dat box shape. (I don't care what you say. 2010-2013 Mazda3 doesn't look as good as this to me.)

But then again I'm afraid

1) Gearhead stuff proves too hard for me (and I try again and again and screw it up multiple times, but my dad wouldn't let me accept defeat I promise.)
2) Challenge of selling 3 fast enough to get this car.
3) Friends I just made 3 weeks ago having no understanding of going from new car to perceived pile of crap.

If this is a stupid idea please save me now. My innate desire is hardly controllable.

Thanks Opponauts for being a car guide. You guys really rock. Also sorry for that horrible $600 Fiero. Keep on being awesome.