If you're afraid to experiment with using a #PasswordManager or #2FA in case you end up getting it wrong and losing access to all the things (I am), how about doing the counter-intuitive thing and start with using it only for the stuff that doesn't really matter. All the burner accounts you create only to comment on blogs and forums on whatever. After a few days/ weeks/ months of creeping up the learning curve and making noob mistakes, you can slowly include your more mission critical stuff.