For tips and how to shoot inside a room, it is better that you use Google. There's plenty of information about the subject although the two main points are to have sufficient like (not from the back of the object that you want to shoot, of course, else the details will not be seen, just the shape) and if you're recording voice too, to control the amount echo. Less is better. Empty rooms with no furniture have lots of echo. Rooms with carpets and fabrics on the walls tend to reduce echo.
As for software, Camtasia should be enough and it is cheap. Although you may want into some free software (I knew one that was very good and free, but I didn't use it often and when I had to reinstall my laptop's software, I couldn't remember its name :()