Wear decent gear with protection, buy stuff you've heard of from a shop you've heard of. J&S do some good priced stuff for the budget conscious rider. Make sure your helmet is a really good fit. A well fitting £50 Nitro lid is going to do you better than a poor fitting £600 Schuberth.
As for riding, remember your training, dominate your road position when you need to ans don't be bullied by other road users to yield if they want to pass. If you get a prick, pull over some where safe and let them go.
Keep up observations, lifesavers, shoulder checks etc, but make them count, also many leave it to the last second to look round, look a little earlier as you'll have time to react more.
If you feel you're struggling with any aspect of riding, try and find a friend who has done some further training and get advice. Do watch out for friends who might have a lot of experience but might not be best suited to give you advice. I got told before to forget what the riding school taught me as it's nonsense. It's not, it's the building blocks that you start from, not substitute later on. Or call your CBT place and ask for a half day with an instructor to go over anything you're not sure on.
Where are you based? Someone on here might be local and happy to go with you if you wanted any advice or reassurances.