Congrats Bill on getting started. Kit building is very satisfying enterprise and I am sure you will enjoy it.

You mentioned you have sandpaper, but you might take some time and make a few sanding blocks. Most useful to me are 10 inch long 1 by 2 firring wood wrapped in various grits of sandpaper. (I use thumb tacks on one edge to hold them on.) I also have a few 1/8 and smaller ply sticks that I glue sandpaper onto for tight places like rib cut outs.

Also consider getting one of the small aluminum miter boxes so you can hand cut stringers, tri stock, and other small straight cuts. You can buy an Exacto saw, but I find myself usually using a hack saw blade the miter box. No handle, just the blade.

Have fun on the project!