Lindsay Weirich (thefrugalcrafter) recently did a beginner-friendly paint-along video using watercolors in a Stillman & Birn Beta series mixed-media sketchbook. The video is just under 25 minutes, and by the end you have a beautiful tropical scene!
You can see the paint-along video here:
The Stillman & Birn Beta series mixed-media sketchbooks are available in a variety of sizes from Amazon and other retailers.
Stillman & Birn mixed-media sketchbooks come in a range of paper weights, types, and colors. You can see details of the entire range below to find the sketchbooks that best fit your needs.