I'd never buy or use anything like Alexa.
On each of my devices I have a different name and email address. I do not tell a device what my main phone number is. If a phone is needed for recovery, then I have a 2G Phone PAYG which is normally off I can use and is registered to a different name. If needed I'll switch it on, get the code and switch it off. I never link two devices via an email address because Google do.
I do not use the same anti-virus on each device. You allow anti-virus companies to check everything you do when you agree to their T&Cs. From the programs you use, sites you visit and you also allow them to read and download anything they choose, including emails and passwords. Maybe even the Access program you are working on! Antivirus know as much as anyone exactly what you do from switch on to switch off, and they sell it to whoever they choose. They maintain the virus fear to steal your data.
I do not use a free email address. I use a secure and paid for email, no adverts, no data sold, that always sends encrypted emails. I refuse to fill in CAPTCHA which is a spy and download software.
Problems coming are new devices in the home, TVs fridges etc. How do we turn off that stuff? In the UK we have Freeview and now if you want to see something from last week you need to register. So I registered with each using a different name, DOB, Postcode and email. Then deleted the email addresses. Never yet had any spam from a deleted email address.
'They' want to get rid of telephone landlines and force everyone to use a smartphone. That way every conversation, text etc and where you made it will be stored, maybe for ever. There is so much computing power being used on these intrusions on privacy that if they were closed down global warming wouldn't be a problem any more. 'They' also want to see the end of cash for obvious reasons. Already MasterCard are selling your transaction data.
Paranoid is maybe an explanation, but those beggars make you paranoid. It's a game, just don't make it easy for 'em.