I have this template I'm going to start on unless anyone has other suggestions.

At 150, 300. I think this link should work:

https://canvas.fediverse.events/#tu=https%3A%2F%2Flemmy.nz%2Fpictrs%2Fimage%2F96826d33-de00-4472-a04c-f0352ab3a8b9.png&tw=130&tx=150&ty=300&ts=ONE_TO_ONE&x=215&y=365&zoom=1

Adjust the opacity in the settings to see where to place a bit better.

You log in using your Lemmy account, you don't need to enter your password, instead you enter your username (like dave@lemmy.nz) and it will send you a code via DM to enter and confirm it's you.