Newbie technical questions

Just bought my first SVX (1992 LS) and have several questions. I did a little research first, and the car I bought had new front rotors about 10,000 miles ago, and a rebuilt '96 tranny in April. I've already scheduled for rear bearings in about 2 weeks. I do, however have a list of smaller things I need advice on fixing

However I have three main questions:

1. The antenna mast is broken off flush at the base. When I power the radio on and off I can hear the antenna motor running, so I think it's good. What are the odds that I can just replace the mast itself, or are there other parts inside (the track, etc.) that will force me to replace the whole antenna/motor assembly?

2. The driver's door window switch needs to be replaced (of course.) I need directions on how to get the door panel off and back on again so I can replace that $135 switch myself.

3. The right front window doesn't open or close from wither the driver's switch or the passenger door switch. Any opinions on whether it's
a. a bad switch on the right side,
b. related to the problems with the left side switch, or
c. a bad motor.

And how might I find out which it is?

Any help would be really appreciated.

Thanks.

Nick