Welcome to all the fun!
If you’re using a material/object more than 1/2” think you’ll always want to remove the crumb tray. (The head might possibly work around something taller but it can hit the object and that can cause lots of annoying things like a skewed gantry, move your piece, etc. Also the laser can’t focus higher than 1/2” so image quality can suffer. )
A kind user posted this free file for no math ruler I find super helpful when I’m taking out the crumb tray.
All you have to do is prop up your item until the surface is between the two target lines. No tricky math at all 