In all honesty, Composition isn't the sort of thing you can make a living off (doing just composition, I mean). Most composers seem to do a combination of composition for any orchestras willing to play their music (or for any that commission work) and teaching music. You should look into any local orchestras, see if any of them would be interested in playing your music - that's a good starting point for you :P and just generally getting your music around (uploading it onto places like youtube, for example).
Regardless of what you chose to do, you should still keep on composing even if it's just a hobby ;) One can 'permanantly' compose as a hobby... I'll probably keep composing for a hobby (definately not taking it further than that though, to be honest :P).
I hope that's all somewhat useful to you :P