There is a lot of advice on bike commuting and on riding in traffic. I even used to teach classes on riding in traffic. There is a lot to learn, as some things are counter-intuitive. I don't know where to point you other than to recommend the book Effective Cycling by John Forrester. The book and its author are controversial, so take it with a grain of salt, but I happen to like it. Forrester is opposed to special cycling infrastructure and believes bikes belong on roads only. I used to agree, and I have good nerves and can survive fine on all kinds of roads, but now having enjoyed bike paths and trails, I think they have a place, too.

There is a term "vehicular cycling" which you should read about. You ride (or really drive) your bicycle as if it is a vehicle, because it is a vehicle. You have the same rights and responsibilities as other road users. When the lane is not wide enough for a motor vehicle to pass you safely in the lane, it can be safer to "take the lane" and discourage the driver from doing so. Taking the lane can also make you more visible than slinking along the road's edge. There is a fear of being hit from behind, but it is usually not justified. Most car/bike collisions don't happen this way. When I am on a narrow rural road that turns to the right, I move to the center or left of the lane so I can be seen from behind.

These are just a few points. There are many. Do web searches of "bike commuting" and "cycling in traffic." That should turn up a few good articles.