How to change the default brush to be some other brush in Essentials 5, making the new one the default?

Hi, Everyone!

How can I change the default brush to be some other brush? And perhaps change the default paper size & dpi properties to something else?

The last time I tinkered with any Painter version must've been 20 yrs ago...

Am grateful for any attempt at helping an old fart out...

Best,

AC