Well done you! I bought the Grace Queen quite recently and am having fun coming to terms with it - steep learning curve though. Like you I don't have a great deal of room - just enough to get round each end and to work front or back - but then, that's all I need really.
The only advice I can give is to practise, practise, practise. I started by trying it all out just using fabric I knew I'd not use for anything else. Then I bought a couple of baby panels in a sale and had a go with them. I'm now working on some charity quilts - again crib size. My first couple of efforts won't even make the charity shops(!), but I think I'm improving a bit now. Not sure when I'll progress to anything more precious though :roll:
There are lots of clips on uTube - do a search for short-arm quilting. These have been very useful.
One other tip - don't go too fast! I found quite a difference when I slowed it all down a bit. Good luck and do let us know how you get on.