Okay, I've got a bit of brain space and breathing room now, so I'll try to address this.
First and foremost, there's nothing you can do right now, today, about anything you've said or done on the internet that potentially uniquely identifies you. Best you can do is start the process of reducing that footprint, but it can take months or even more than a year for the effects to trickle down.
Michael Bazzell has an excellent book on privacy:
inteltechniques.com/book7.ht… The tradecraft in the book is not for everyone, but you can take what you need and leave the rest (as long as the stuff you're not doing isn't underpinning the stuff you are).
You can (and should) also pay a service to start scrubbing all your info off the internet. I use PrivacyBee, but that's just me. Research and find a solution that works best for you.
Take the steps necessary to make your real estate tax records private. Same with your marriage license. If you have kids, same with their birth records. Have your home removed from Google maps, Bing maps, etc.
Stop using the same email address for every online account you use. Either learn to use plus addressing (
streak.com/post/gmail-plus-a…, it works for all major email providers), or buy a domain (with the registrant info blocked) so you can use whatever email address you want, and use a provider that lets you use your own domain.
While you're at it, stop using the same password for everything.
Become aware of your Patterns of Life. These are the repeated, predictable habits you have. E.g., you go to work on the same days, at the same times, via the same routes. Ditto how you come home. You go to certain stores on the same days, at the same times, and you buy more or less the same stuff. And so on.
Get a device or app that'll alert you to the presence of airtags and other bluetooth tracking devices.
Become aware of where all the cameras and surveillance devices are around you. This includes doorbell cameras, home security cameras, in-store cameras, parking lot cameras, traffic cameras, police observation devices, Flock cameras, cameras on vehicles (particularly Teslas), etc.
Stop carrying your phone everywhere.
Stop taking stupid quizzes/participating in silly social media third party apps (like the one recently that took your X name and gave you a 4-quadrant graph representing your D&D alignment). They're designed to associate your social media presence with an IP address. And those silly post chains in which you answer a question about yourself? You're revealing potentially uniquely identifying personal information.
Even if that one bit of information by itself isn't damning, it can be combined with other bits you've provided in the past or will provide in the future to put together a picture you'd wish they hadn't. In intel circles, this is called "aggregation": When someone can take two or more pieces of unclassified material and arrive at a conclusion that is classified.
Stop posting pictures of yourself and your family online. Stop posting where you'll be, and when. Don't even post seemingly unidentifiable pictures along with other useful info, e.g., a completely unidentifiable photo, but it's taken near your house. Someone can combine that with the rough day and time the photo was taken and deduce your location. Think it's impossible? Remember the 4chan Shia Labeouf flag incident?
Right now, right this minute, most of this won't make a difference. But it will over time. Do your future self a favor.
As for PERSEC, up your situational awareness. Get hardwired security cameras, and place them in nonobvious locations. If you like, keep a wireless, obvious camera in an obvious location as a sacrificial and/or decoy camera. Make and practice plans for what to do in the event of a home invasion. Ditto a SWATTING. In the former case, the watchword is escape. In the latter, de-escalation.
These are all personal things, that by and large depend on your specific personal situation. So it's tough to give detailed advice. But what I have given is general advice that's applicable to most people.