Hi Janusdog, and welcome to TE! I'm pretty new to all of this, too but my husband has been riding for a while now. When we first started riding together, I felt badly that I was a lot slower than he was, so I always felt like I "ruined" his ride. I don't like to do things that I'm not good at, so I almost just gave up. But, we eventually came to a solution where he rides ahead of me, and we meet at certain points along the way (it helps that we always ride along the lakeshore path) just so he could make sure I was doing okay. This strategy allowed me to ride at my own pace and not worry about what he was thinking, while also challenging me to get better so that we could ride together again.
We still don't ride together, I'm just not nearly as fast as he is, but I can ride much longer and further than I could when I first started. Mr. Sheesh is going to start racing soon, and while I know that I'll probably never be to that level, at least I can have fun doing something that he loves to do.
Remember, it's all about having fun. If you're not enjoying yourself, because you're too worried about looking dumb (and really, let's admit it, we're wearing spandex for goodness sakes!), then it will make it much harder to stick with it. Good luck!