Magnetic Field inside Gap of Toroid

Hi -

I am new to COMSOL (going through tutorials now) and have some questions in regards to modeling magnetic fields.

I want to model the magnetic field inside of an air gap in a circular toroid. I then want to add a cylindrical cable in that gap to look at how that magnetic field affects the potential on that cable.

I assume I will need to use the RF Module since it has the eMag equations in it.

Does anyone have any starting advice for a newbie to COMSOL/modeling magnetic fields?