I had to look up what the Enhanced Rider Scheme was, as I hadn't heard of it before. Any extra training you get after passing your test is beneficial, and will give you a bit more confidence. So well done!
But as gn2 says - it won't prevent some idiot from pulling out on you. Further training may make you more aware of risks, and better prepared to take evasive action (perhaps).
The IAM and ROSPA offer further training if you are interested in going even further.