Not a website, but the Healthy Minds Program [1] is ad-free and there are no purchases other than with donations.

https://www.humin.org/wellbeing-tools/app

If you wan't to explore the internet, but not big tech's algorithims, I recommend FreeMediaHeckYeah[1]. It should have everything you need that doesn't show up in search engines. It is actively curated by the community.

[1]https://fmhy.net