Sounds good. I had big plans for my 1/2, but my training got waylaid by real life - injuries, illness, and such. So, my longest run was about 9 miles and that was well over a month before the race. I barely ran for the 6 weeks prior. I finished in a respectable time. I only wonder how well I would have done had I been able to train properly! You'll do just fine . . .