I see you have the default set up.
You can accommodate the space at your will.
Preferences > Panels
There you'll find all the windows you can have around, find the ones that are useful for you.
Personally, I advice you the last in the list "general view", which includes a button to flip the canvas, and "tools options", which gives you access to the different uses of each tool from the tool bar.
(I have my program set in my native language so I'm not sure if the names display in English as I said )