Assume drivers have either not seen you, seen you and not registered your presence, or are actively anti-cyclist and will ignore your presence. Most drivers are ok, but a minority will fit one or the other of these groups.
You need to ride assertively, but defensively, when riding in traffic to control the space around you. Big hand signals, taking the lane when required and reading the traffic are all skills you'll have to develop. Roundabouts are the most problematic area for cyclists. Read up on Bikeability and vehicular cycling for some formal guidance. You'll soon develop a sixth sense for when a situation is developing.
Above all, enjoy your cycling - it can become addictive.
You need to ride assertively, but defensively, when riding in traffic to control the space around you. Big hand signals, taking the lane when required and reading the traffic are all skills you'll have to develop. Roundabouts are the most problematic area for cyclists. Read up on Bikeability and vehicular cycling for some formal guidance. You'll soon develop a sixth sense for when a situation is developing.
Above all, enjoy your cycling - it can become addictive.