Betsy: maybe these will help
Yes. You’ll need to download something on line. Most cost a couple of dollars.
You can also buy a Sunset book of these at a local DIY store.
In this post of our formal cottage garden, I show the wooden beam pergola we made for the front sidewalk entry. Maybe you can get some ideas from that?
Here are a bunch of pergola plans available for free downloads. You'll need to search for a style you like.
This page has many pictures of pergolas using logs in various parts of the pergola building process.
No materials or cut list but lengthy discussion on DIY log pergola and timber joining methods.