Hi, Sandy. I have some good news for you. All you need is some 150 grit sandpaper and elbow grease. Buy a couple of sheets that will be 9 x 11" and cut them in half in both dimensions so they will be 4-1/2" x 5-1/2". Then fold the small sheets in thirds along the 5-1/2" dimension. Use a matte knife, utility knife or X-acto knife to cut from the paper side after you have marked the dimensions and cut to a straight edge.
All you want to do is open the pores of the wood to prepare it for the refinishing plus remove any fuzzies from the stripping. You just want to sand lightly. Of course, if you have any damaged spots in the wood and want to blend them in, now is the time to do this. Believe it or not, if it takes you more than an hour to sand, you are probably working too hard.
With the way you cut and folded the sandpaper, you can change to a fresh surface quickly by refolding. You have 3 surfaces to work with on each folded pad and the shape allows you to get in the tight spots and curves.
The kind of wood does matter and you will want to go really lightly on pine, a little harder on oak, ash or maple. Always sand with the grain.
Let us know if you have further questions. Henry in MI