There is a nice GUI way to do this. Press CTRL+SHIFT+G ( or View-CSM in menu) and here you have a lot of options. With (...) you can do almost anything you want. After things be done, type your commit message into input box and press CTRL+ENTER. Pretty easy.
If you have remote repo - you'll see a little spinner mark in bottom left corner near repo name. Press it and sync to remote easily.
But in order to do all of this you must have repo to be initialized in your working directory before (git init
from terminal).