I find it much easier to keep my activity to two websites, Deviantart and Furaffinity, and post my work elsewhere. I'll respond to notes and comments here, but I won't be going out of my way to keep updates on what's going on, such as what commissions I'm taking on, here as it gets a bit hectic to keep track of multiple websites.
I'll continue to post work here, but If you want to know more of what's going on with my work I would suggest following me on Furaffinity and Deviantart.
As for keeping up with the activity, you might find the option to email unread notices, comments and PMs of use - it can be set to daily, weekly or monthly.
Bear in mind that there are tools for posting to multiple sites at once ( https://wiki.inkbunny.net/