Jazzguitar

If you haven't already come across him, Jens Larsen is a great teacher with an excellent YouTube channel. He's got loads of beginner-friendly videos but a lot of advanced stuff to think about too, and he puts out a lot of fresh content here and there for picking up tricks and chord voicings.

Maybe not exactly beginner-level stuff but Ted Greene was also an incredible teacher, particularly of chord melody playing. His students have assembled a bunch of his material online in a way that's fairly accessible at tedgreene.com. He wrote a lot of stuff in a sort of idiosyncratic notation but once you figure it out, his arrangements are amazing. There are really powerful ideas in there about sticking to small movements for pleasant voice leading, using voicings that support lots of different choices of melody note, etc.