So JLPT Sensei is not that great of a resource… Which webpage is?

Yesterday I asked if JLPT Sensei's Patreon was worth it for the material. I'm working on my N5 and N4 grammar and I have to constantly look up what they mean, preferably with examples. Do you have any website you recommend for this? If they have premium or paid features, are they worth it and why?

Thanks a lot!