Yeah, this kind of fight are painful and harming the community. If I had to recommand anything to start with: Bitcoin Core + LND. Then they can figure out later if they want Knots, CLN and other stuff. I would even recommand to begin with an OS like Start9 or Umbrel.
Discussion
This comment shows you really dont know what you are talking about. The "fight" is the life blood of the network that keeps the discussion of purpose open and ongoing.