I used to worry about this, then about 20 years ago I went to pick up an antique car in Burbank and drove it back to Tucson. An older friend who came with me gave me good advice, just stay to the right, relax and let the traffic flow around you. I realized this actually wasn't too stressful once I stopped worrying about it. I wasn't going dangerously slow, just at or a bit below the speed limit.
OTOH, you might get more forgiveness and less aggressive interaction for being in an obviously limited vehicle, compared to being in a shiny new Tesla.