Aside from purchasing a copy of the MLA Handbook, 9th edition, reading it, learning it, and living with it; there are a couple of other sources that could help you out when writing papers in MLA. Remember: the definitive answer to any MLA style question is in the Handbook. No website or outside help is ever as correct as the original source.
But, it can be hard to always have your own copy around, so here are a few other sources that are definitive, but quick and helpful:
During a non-pandemic semester, the Earl K. Long Library has copies on Reserve you can use in the library and check out for 3 hours at a time. But in the mean time, try
Purdue University's Online Writing Lab MLA guide
Zotero--a free browser plugin that can help you collect and store your research information and transform it into a bibliography in many styles including the MLA.
Zotero allows you to start gathering research immediately. Go to Zotero.org and use the Download button to get the latest version. You will want to register for a Zotero account and login so you can sync your account and participate in groups, if you choose. Be sure to also add the your plugin of choice for word processing--Word or LibreOffice. Whenever you update your version of Zotero, please also update your word processor plugin--they may not be compatible otherwise.
Don't forget that MS Word also has a tab on the ribbon for 'References'. Right now, UNO's MIcrosoft account has the MLA 7th edition on it. It is mostly the same as the 8th, with some changes for digital items. Check with your professor if he/she has a preference that you work with a particular edition, and always follow your instructor's preference for citation. Word.