Frankly I like to setup my subscriptions and then set my the main page to be Subscribed and New by default. That way I see all the new stuff. Switching back to Active is useful too. You can do the same thing with the Local and All feed. Especially the All feed can be interesting.
Beyond this the ones I like are:
- https://beehaw.org/c/privacyguides@lemmy.one
- https://beehaw.org/c/ukraine@sopuli.xyz
- https://beehaw.org/c/fediverse@midwest.social
- https://beehaw.org/c/energy@slrpnk.net
- https://beehaw.org/c/securitynews@infosec.pub
Otherwise just go the the communities tab and select Local and read down the list and pick your interests. Lot of the local ones are really good, no need to go wider. I am still looking for a good Python community.