I’d say it totally depends on if your car came with complete service history and what the current mileage is. If you have that info, you can figure out what comes next. If you don’t, and you’re like me in the mid-60,000 mileage range, I’d consider replacing all fluids and filters to start fresh. Check your engine mounts, your intake gaskets and pcv valve as well.
I couldn’t do the trans fluid or brake fluid at home but I did the oil and diff oil in the driveway no sweat.
Good luck!

I do oil changes, brakes, spark plugs, air filter, injectors, and O2 sensors at home. And then when I need more tools or a lift, I take the car to the auto shop on base. I let indy shops do the trans service.