Aurora window is too small and can't easily navigate. Aurora has black bars on the sides which don't allow me to make the window larger to activate trainers. Can't see "activate trainer" button.

Go to desktop mode if it helps, but you want to click on your profile icon on Aurora, click on appearance and check the box for "Maximize window on start."
The latest Aurora version should've addressed this issue but if you can't see the trainer button then users have noted that there are scroll bars you can use on bottom and sides of screen.