Welcome to the world of DCS helicopters!
Once you've autostarted, you'll need to make sure your autopilot is switched on. That will help you control the beast. On the right of your pilot's knee, there are 3 lights (left, middle, right) on the box between you and the co-pilot. Swith the left two on with mouse clicks. Now when you take off, you will need to use the rudder (usually joystick twist / pedals) to keep the helo from spinning. You may also need to adjust the stick - I think it's push back and to the left a little from memory.
Don't feel bad about crashing, flying is a great challenge. It takes a while to get used to, but it really is a pleasure.
Edit: Slow typing award goes to me I guess :)