Adobe character animator - Character positioning

How to change the positions of one character to add multiple characters ?

ad sometimes character is too large in the screen or come in the middle, or out the screen, such as how to position and adjust sizes?

and is this is a good software to make an animation video scene for a undergraduate project? (To specifically to this-Make an animated video to show a business idea using live animation with the rest of the team. Gving each of them an animated character to speak behind an animated background)