Julia user's guide for the positive semidefinite program with variables in {-1,1}

Dear all,
I am using Julia for the first time to work on the positive semidefinite program. I’m trying to solve the PSD with variables in {-1,1}. I don’t understand how to write objective functions or variables, … I wish to find a document where I can learn to write code for my problem in Julia.
Can anyone help me? Thanks.

I don’t know the best answer to your specific question, but https://jump.dev/ is a great place to start.