Do you know of any guides/resources for that?
Just use an extension from the list
https://github.com/aljazceru/awesome-nostr#nip-07-browser-extensions
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So I still have to raw dog my nsec into one of these?
Yep instead of giving your nsec to random websites, you have it in one secure place (your browser). Ofc It's not as good as a signing device would be.