Sketchbooks are such fun! You can be free, and just enjoy sketching and painting both. You don't need very many supplies. a good watercolor sketchbook, a pencil, sharpie and a small watercolor kit if you want to paint it. I love sketchbooks, and have a stack that I have done over the years. Just drawing every day things around us.
Old truck drawn with a sharpie
Chef figurines drawn in sketchbook, then using watercolors
Cotton using a fine tip sharpie and watercolor
The Wash Day is a sketch I did while in Lincoln, NM. That is a wonderful place to go and sketch and paint. I have so many fun memories from being there...sitting on the street, drawing and painting their little town. If you ever sketch on location, you will be hooked forever!