Power door locks

I bought my 1998 Ford Explorer Limited two years ago. It currenly has 98,000 miles. It seens like things are starting to go wrong. My son is a mechanic, just starting out & I'm trying to get some information for him so he can help me out. First of all the power antenna quit working. You can hear the motor when you shut the car off & it should be going down, so I think it's just the mast that needs to be replaced. Is it hard to do and does anyone have a way of telling us how to do it. Today I got home from work and I could't get out of the car. The power door lock on the driver door quit working. We had to take a pair of plyers and pull up on it and then I tried locking and unlocking and it seemed to work. When Ishut the door it automatically locked on it's own and we had to do the same thing. I've been online looking at how to take the door panel off and can't seem to find any good diagrams or instructions and wonder if it's the actuator that is bad and needs to be replaced. How do I find out what is wrong with it. I'm a single mom and have limited income so any help would be greatly appreciated. :D