Hi! I started learning about privacy a few months ago and there is a few (many) things I'm struggling to understand and I would thank you if you could share some documentation/sites to learn more

One of the issues is about DuckDuck Tracker Blocker on android phone (low/moderate threat level), which takes the VPN spot. Is it really useful? I've uninstalled several apps and replaced with FOSS when possible, so it's not blocking a lot of stuff lately (or so it says) I've also been trying Proton Free+nextDNS (also not sure how to choose lists) but IDK how to decide which one is better, but I'm wondering: does DNS make the blocker app redundant? Isn't it kinda the same job (different lists, maybe)?

Thanks in advance!