Unless they add something last minute, there isn't much in the way of events at Celebration this year. There's the Star Wars Disney night, but that's sold out, so that's a moot point, unless you already got tickets for it. I did hear something about a 501st bash, though? And I haven't looked up the details yet, but I know there are photo ops for the different detachments, etc.
I personally love attending panels, and have made myself a list of the ones that sounded most interesting to me (you can also star panels in the app that just dropped, but I have a more detailed method that involves a spreadsheet, because I'm that kind of nerd, lol).
If you want to attend the first panel of the day on the Galaxy Stage (or the streaming options on a couple of other stages), you'll need to enter the lottery to have the best chance of getting in. Lotto ends tonight at 11:59pm. Some panels and the Celebration store will also have a "lightspeed lane" option that can be accessed starting the morning of each day, that lets you save time not waiting in line (badge activation required).
If merch is of interest to you, you might be interested in previewing Celebration store offerings on the website. Some other major retailers (e.g., Funko) also share product previews, so if there's one you love to collect, you might see what they have available. (Funko and Loungefly are also stores with a lotto to get in.)
If ADA is something that is of concern to you (and with health being of concern to you, perhaps it is?), you'll want to stop by the designated booth and get a sticker for that. Check the website for those details.
It might also be worthwhile to check the website to review entry procedures, given that they require proof of vaccination or a negative test before they let you in.