Flying out of MCO on an 8am flight on United, so terminal B. Will be parking at the airport garage. Looking for any and all advice…first time at MCO and the anxiety is making me

We have children and PreCheck. What time should we get to the garage? How long will it take to get in the airport? Where should we check bags…I read online there are bag check stations inside the parking garage. Should we bet on that or pull up to curbside check-in, check in luggage, then pull around to park in garage? Would love someone to walk me through step by step how to arrive at the airport like a local. Thanks!
For domestic flights, arrive a minimum of two hours ahead. MCO is a oddball; sometimes an hour is enough and sometimes three hours isn't. Sometimes you get hung up checking bags and getting boarding passes; sometimes it's a TSA mess. There are so many people who fly from there who aren't regular fliers, so they don't know all the rules about having shoes off, no liquids, etc...or they just forget they had that bottle of water in their hand...or they want to argue that the Gogurt is not liquid...or they are wrangling a toddler and an infant, two car seats, a double stroller, and 8 bags (2 for each of them, even though the toddler and infant are lap kids)...

Or they don't understand how to use a kiosk to get bag tags and boarding passes. Or they want to argue about their seats, because they didn't get sat together when they bought the cheap tickets that specifically state they are getting whatever seats are available, and those are usually the middle seats in the back of the plane....
(Why, yes, I've encountered all of that flying out of MCO....thanks for asking)
Run by parking B to see if you can get in there; it's the closest to Terminal B.
Take a look at the map, beforehand. There is signage everywhere, so that helps.
If you have two adults, I would drop the bags and the 2nd adult and two kids (if old enough to not have to be wrangled by an adult constantly, say...5 and up), then go park the car. Just because I hate dragging luggage through the parking garage, lol. United is at the farther end of the terminal, after you drive up to it