Make a backstory for your nation. Find some other nations and make a map together. As one of the stickies says, magically starting your war at their border is a form of god-moding...but how will you know if you even share a border if you don't even have a map? I've seen plenty of pretty good RPers hurt by the fact that their country seems to be drifting through space...
Honestly, if you want to TG me, I'm willing to do an RP with new people if they're willing to learn and don't mind constructive criticism.
So yeah. When you find a good RPing region, get to know your nation and the nations it coexists with, and develop your writing skills, you'll love this site.