Pay full attention at all times, and realise you will be invisible to many other road users in the UK, as there are so few riders.
Get all the post-test training that you can. Getting a licence is the start, not the end.
There is BikeSafe, the DVSA Enhanced Rider Scheme, and Advanced riding courses by the IAM or RoSPA.
If you do any other courses, make sure your instructor is properly qualified – many aren’t.
There are also off road and on track courses to improve your bike control. Again, make sure the organisation is properly accredited for training.