Attractive, stable looking bike, and I hope you enjoy it.
Apologies once more if I repeat the bleedin' obvious, but if you've not ridden on the road for a while, there may be a temptation to ride like you were driving a car, and crank up the gears as soon as you can, all eleven(?) of them.
I would be inclined to stay around the middle gears, (is it a 42 chainring?) and the 16, 17 or 18 tooth sprocket at the back on flattish terrain and get a bit of flexibility (without windmilling) into your legs. It also reduces equipment wear when the chain line is straightest.
The weather here has been vile today with repeated waves of heavy rain and wind. Out on my teatime spin near Beningbrough Hall I caught up (with difficulty) on a group of pensioner cyclists looking sodden, tired and forlorn, with soggy panniers and mud roosters up the back of their anoraks.
I got talking to the lady at the back of the pack, and would have advised her to drop down a few gears (she was on big ring, tiny sprocket), until she told me they had just ridden from Grassington today and were continuing to Bridlington tomorrow.
In true Sunday newspaper style, I made my excuses and left