To move up...

[kerowo]

Go to the play tables and multi table until you are comfortable with the speed you will be making decisions at, get the mechanics down so to speak. Then don't try and move up and multi table at the same time. Move down a level so you aren't worried about the losses so much.

You may also have to face the fact that it is going to take a while to get your multi table game to the same level as your single table game.