My tip to improve your typing speed is to... if you work in an environment that provides you with a computer, probably best to stick with qwerty. That is unless you have to change it do to health reasons. At the end you should do what's best for you. The sad fact is qwerty is default standard. Other layouts are harder to find unless you set them up yourself.

If you are working on your own machine and have full control over your hardware try other layouts. I hear Dvorak, Colemak, and Workman are much better alternatives.