l live in Dallas, Texas. I am going to take rock climbing classes, then l need to take aid climbing and ice climbing classes. It is my goal to climb Mount Everest. It will take a lot of training and money, but I will find a way. Where there is a ying, there is a yang.
...anyway, l just need to know where to find those classes in the Dallas, Texas area.

You can learn to climb rock & do some reading about climbing snow covered peaks & glaciers, but then u will need to travel to some real glaciers & high snow covered peaks to learn about climbing on snow & ice - l would recommend classes & some guided climbs

http://alpineascents.com/rainier.asp
http://alpineskills.com/cat_snowice.html

Then u can do some trips & climb some big peaks to get better route finding skills & become a better climber. You will only have a few thousand dollars invested in gear & climbs & if u really love it & still want to climb bigger mountains then u can think about the bigger commitments of Denali & Himalayan peaks like Everest.

Good Luck