To practice typing is to familiarize ourselves out with where the letters are positioned and which finger to use for each one of them. If you are having an issue improving the speed of your typing, don't mind it, just mind the accuracy and the speed will follow. Everybody is different, some can improve the speed immediately and some improved their endurance for a very long time of typing. Don't be sad if your speed is not improving dramatically, as long as you are happy, keep on typing.
Are you fking crazy? I wan't to pump up my typing speed. This be happy crap won't do anything . Only regular practice and improving posture while typing would help.