I agree with Rookie. If you are scared to even ask this woman, then I would look elsewhere. You may even try Craig's List, which is actually how I found my trainer. (long story short, it was actually a horse for sale that I went to see, but she was in the middle of a lesson when I got there and 3 years later I didn't buy the horse but I'm still riding with her). You are not in a hurry to train your mini, and you can search around for other people. In the mean time, try going to the Library and taking out books on training. I'm not saying do it yourself, but there may be tips in the books that can help you get started until you find a trainer that suits you and your mini. That's just my two cents.
I used to ride at a barn with a horrible trainer. He was really good in some senses, he knew -exactly- what I was doing wrong. But after snapping at me one to many times, I quit. Did I learn alot? Sure. Was it fun? No. The girl I'm with now I feel is just as talented, and doesn't -yell- at me when I make a mistake. Good luck!
~He knows when you're happy
~He knows when you're comfortable
~And he always knows when you have carrots.