At the beginning think about your future career. if you are going to fly missions a lot up to lvl4 (and beyond) what ship are you going to use? .... and you will fly missions a lot to make ISK!; at least for paying for other occupations. ;-)
for highsec missions (solo) the Golem is one of the best.(sure there are other good ones)
a very good road to missionheaven could be: Kestrel->Cormorant-> Caracal-> Drake (!) -> Raven -> Caldary Navy Raven -> Golem (skip one or two like wished)
I started with gallente (up to almost fully outskilled T2sentry-domi but now changed to Caldari just because of Golem)
the gallente way could be: Incursus -> Catalyst-> VExor-> Myrmidon-> Dominix (only Rails and /or droens for Missions!)
But thats it. Don´t use Gallente Marauders for Missions. Don´t use Navy Domi (to expensiv)
duatha hannan