Definitely connect with the County government office for your dad's estate and abide by rules in that County and State.
Here's a checklist from AARP titled "What to Do When a Loved One Dies"
https://www.aarp.org/home-family/friends-family/info-2020/when-loved-one-dies-checklist.html
Also, for an overview of how the general process will work so you can get your bearings and to have helpful tips, I have found the NOLO guides helpful. My public library has them on the shelf (but check which edition is most current).
One of the NOLO titles I checked out is "The Executor's Guide: Settling a Loved One's Estate or Trust" by Mary Randolph. J.D. The NOLO titles were very helpful after my mom died as I helped my elderly dad deal with things. It also helped convince him to take actions on retitling some assets to ease administration of his estate when he dies.
There are even books from the For Dummies brand such as "Estate & Trust Administration" -- again found at the library -- which gives easier to understand explanations for those of us without legal backgrounds or prior experience with this legal process.
Best wishes and sympathy on your dad's passing.