Sport Aviation used to be my favorite, but that was in the Jack Cox - Paul Poberezny era. But I still read it, I am a lifetime EAA member.
My current favorites are Kitplanes and CONTACT!
i also read the AOPA magazine.
Youtube Mike Patteys Scrappy build.
I follow Rotecaerosport (my old boss).
Make and open source cub design much like a locost kit car complete with auto conversion and the numbers of builders would jump up, costs.
I’m fond of Homebuilt Help.
Unfortunately a lot of home builder blogs vanish after the aircraft is flying or the project is abandoned.
Some factory kit promotional pages can be of limited value, and I do revisit these from time to time.
I’m not so fond of printed magazines as they are expensive here and far too US centric in content. I’ve found too, that magazines are more ad than article.
I don’t mind admitting that I love YouTube. Some content is quite poor, but some are absolute gems.
Aviation Week, Several FB pages including P-51 Mustang, 355th FG; P51SIG, WW2aircraft.com, Osprey Blogs. I'm still deep into research into the Mustang book past "P-51B Mustang; North American's Bastard Stepchild that Saved the 8th AF.