A bell is essential to warn others of your presence, especially if you ride on the canal... I used to be a road cyclist and it's important to ride in a straight line within a metre of the kerb. Too many cyclists weave in and out to avoid potholes on the road. Also worth turning your head when going around parked cars to avoid being hit. It's all about being seen and riding safely, so hi-vis clothing a decent helmet and lights are a must. I think being a cyclist and ex motorcycle rider has made me a more considerate and conscientious car driver towards bike riders.
Riding on busy roads these days is not for the faint hearted however proficient the cyclist is, and I think having bike insurance is something I'd have if I was a regular road rider.
I have a bike but the frame is too small for my height. I'm looking to buy a second hand hybrid with a 21-22" frame. If anyone is selling one in good nick for a fair price PM me.