Don’t start here. Get something tiny: some ewaste, a rPi3/4 or an n100.

Build a Pihole to block ads, malicious sites and trackers on your network

Risk free, tonnes of learning opportunities, huge utility, tonnes of documentation and guides to help.

Once you’ve built a couple Piholes (break and rebuild then) you’ll have an idea of what you might want to do next and what is achievable for you.