I'm a noob to the MiG-21 and to DCS in general. Been flying the F-5E more as it is easier to learn, nice clean cockpit layout. But I do like the MiG (it just has that 60's coolness to it), just mostly doing fast missions with it, since it starts you in the air ready to rock. (just have to charge the gun...). I actually landed it without breaking anything on my first flight by some miracle... ;)
Grim Reapers have a lot of good tutorial videos on it: