NoodleTools has a great Help page with a wide array of detailed tutorials about how to use the service here: https://noodletools.freshdesk.com/support/home.
If you can't find what you need there, don't forget that you can Schoology message or email the librarians for help. Click on Help at the top of the page.
If Noodletools does not appear to have a form that fits your particular source well (e.g., a primary source found on a website -- depending on the source, it may be difficult to use Noodletools to cite this kind of source properly), try this citation maker created by the Oregon School Library System, and select "Other" from the source type menu on the right. You can create a more thorough citation here, and then copy and paste it into Noodletools or alphabetically in your bibliography.