Have you taken a full touch-typing course? Touch-typing (REAL touch-typing -- not practiced single-finger poke or custom-splayed hand peck) installs keyboard use in your cerebellum and removes the function of typing from your higher brain.

A new alt-key should be as difficult to master as a new coffee mug: You look at it for a fraction of a second and then put it into regular use without any further thought.

If you have to find keys, memorize them and 'practice, practice, practice', it's a sign you may need to master the basic tools of your profession first.