Is it convenient to draw with the mouse in photoshop?

It is inconvenient to draw with the mouse. And PHOTOSHOP is not used for drawing, PS is an image processing software.

If you have to draw in PS, recommend a graphic tablet (the price is relatively high, so it is not recommended because you have no artistic skills). If you use a mouse, please practice the pen tool more.

Practice makes perfect. There is no shortcut to anything, and getting twice the result with half the effort is not necessarily a bad thing. Good practice, I wish you an early PS master.