@Scott-And-Lisa3 , the city of Los Angeles has a home sharing( short term rental) program in place. I suggest you read the home sharing guidelines and see if your property qualifies (as you now have an ADU on your primary residence). The city also provides a Rent Stabilization map that you can use to see if your property falls under that ordinance (I find it very hard to see how a SFR that you own and reside in would but you never know). The city also offer online registration and list what is required etc…
Just Google City of Los Angeles Home Sharing Program and it should bring up the guidelines, registration etc…under the planning departments website.
Best—