workflow when modifying a score

I have a general workflow question.

My ear training is generally poor, so I rarely enter the right notes the first time. As a result, I like to map out a score rhythm first, with rests, or notes that are wrong but close (I'm fast with rhythms and I DO get those right the first time - I'm a drummer). I then spend the vast majority of my time modifying a score that I have already mapped out. Working this way seems to require hitting the escape key constantly, because every time I change a note, I'm immediately thrown into the mode to enter more notes. But I don't want to enter notes, I already have notes, I just want to spend the next hour or two CHANGING notes. Worse yet, if I am not very careful to hit escape immediately, I am indeed very likely to enter a note - a random one, who knows where (because my mouse is moving to another note I want to change - and while the mouse is moving, Musescore is assuming I want to place notes at the mouse location). And when I do accidentally enter a spurious note (say, by brushing the keypad mouse button with my other hand, which is fairly often when I'm working fast), I have to hit Ctrl-Z, and then immediately Esc, or it will happen again.

Is there some sort of "modify notes" mode that I should be using, or an option to tell Musescore to NOT switch modes every time I change a note? That would be the ideal solution.

If not, then is there at least a way of disabling entering notes with the mouse? I only ever enter notes through the keyboard. I can't imagine anyone entering notes using the mouse, it seems to me that it would require incredible finger dexterity. I only use the mouse to select things. If I could disable entering notes with the mouse, it wouldn't be a perfect solution because I'd still have to hit escape over and over, but at least I wouldn't run the constant risk of entering spurious notes.