My recommended quick simple basics for the non technical:
Use a VPN. If you don't have one yet, take 20 minutes to research it, then get one for as little as $10/month or $70/yr. Pay for the VPN service with bitcoin or other crypto if possible, and with a new anonymous email used for nothing else. Don't lurk or post here without being connected to VPN.
Use the Brave browser, not IE or Chrome. On a computer. Don't access via phone. Linux, Whonix, or VM are better options than plain Windows, if possible.
Don't go to links posted here to PDFs or GoogleDocs.
Don't mention in your posts any info about your location, career, family, history, timezone, hobbies, gun collection, etc.
Run at least one malware scanner daily. Spybot S&D is a trusted free one.
Other anons may give you different advice & priorities. (And others may say that nothing you try will really hide you anyway so don't even bother.)
A thread with more info on previous board: 8ch.net/cbts/res/629.html