I've used Wacom tablets for many years, everything from the full-size extra gigantic tablet to the Graphire tablet (apparently your Bamboo tablet is the replacement for this), and currently am using the mid-size Intuos tablet.
Some of them have a surface that is easier to draw on than others, but all require some practice to get used to the "feel" of the pen on the surface of the tablet. When making a selection by drawing it often helps to use the zoom function on an image. In Photoshop you can also choose the "add to selection" option and gradually refine your selection. Afraid I don't know what you mean by "having a really hard time" with selections.
Francine
Francine
Schwieder