On Steam, click your username in the top bar, and select “profile” from the dropdown menu. On the profile page, there’s an “edit profile” button near the top right corner, underneath your level. In the “General” tab, the field “real name” should be the second one down

I wonder why they decided to crank up fall damage compared to tabletop. A fall from that height in 5e is 3d6 bludgeoning