Are you familiar with git and github at all? If no, I'd recommend you start there. You can try this.
Otherwise, If you have access to the code on replit, just copy past it or download it and push it to the repository you made on github. Github allows you to create folder and files from their website direclty. You can do it from there but it might be longer than downloading the project from replit and pushing it from there.
If you want more help, you'll need to share more information or ask more precise questions.