help i wanna make a custom layout but idk how to code

pretty self explainatory pretty much, this is the 3rd time i got to make this because for some reason after publishing it doesn't appear

i want to make a custom layout based on der freischutz but can't because i simply dont know how to code man :/

some things i wanted to make were: turn all of the colors of the profile Blue, gold & black 

change the cursor onto the "magic bullet" logo that's used on limbus 

make the background a photo of Der, etc-