Where can I find an auto repair manual?

That depends on what you want really. Paper copy-wise you would need to get something like a Haynes or Chilton manual as Stellantis no longer publishes on paper, it's all done through www.techauthority.com. You can buy the OE service material there on a USB stick for around $125.00. Another option is to go to www.alldata.com/diy-us and buy a subscription for a month, year or multiple years. That gets you the same information that the shops use. It's also what we have here and can post excerpts from in answer to questions. One thing you might not realize with the alldata account, you can "print" complete sections as .pdf files and store them on your own computer for use as needed.