Test - Simples. It's an investment in your future.
That will soon pass....... You'll get better, honest
There are a good few SuperMotards about now, and with a restricted licence the 600 range is excellent as you don't loose too much of the power.
My favourite SM is Dorsoduro..
But it's a bit of an animal and like other Italian bikes can be a little, erm,,, interesting!
The XT660X would be a good move for you too, rides like the 125 but with more smiles-per-mile than the others. Of course there is the Austrian stuff, but I won't mention anything Orange here...
The Dora (Triumph Explorer) would be a bike to stay clear of for a few years. They are a big lump to haul around and a different riding attitude, the 800 Tiger's are much more flexible (ahem!), like this one:
or, you might consider something that rides great on the twisty roads, is a good commuter, has a massive tank range, can tour or take on the rough roads =>
Once you pass your test,, the world is there for the taking, You choice of bike becomes less important as to what you want to do with it, choose a bike that does everything you want and you'll get more out of biking (a bike just becomes a tool to see the world).
I hope this has been of some help to you, if not, no worries, even bad advice is still useful.