Entering with the keyboard may seem intimidating when you think you have to learn many keyboard codes, but in fact the most useful codes will very quickly be learned (especially if you know the rationale behind the codes) and then it becomes much quicker to simply type "q", "t", "h", etc. rather than dragging the mouse around and trying to click it on a specific staff line. Also, once your hands are on the keyboard typing music in you will be more inclined to use keyboard shortcuts (such as Ctrl+A to insert a tab line) and insertion shortcuts which speed things up even further.