There is a lot, and there are a lot of levels. I am working on this now as well. Escalating from where I was, its a learning process. Too much to type in a single comment/response.
If you would like more info on removing your info from the internet, reducing the amount of spyware on your android phone, de-googling yourself, or limiting how much info you spill while you browse, we can connect and I can share what I have been doing. Ive got plenty I still need to do beyond this, but I am happy to share my lessons learned as it were.
or XMPP would work as well