Getting there. Some work left to do sorting out the filament supply and cathode connections. 12SJ7 needs 12.6Vac between pin 2 and pin 7 to function. You're showing pin 7 as having no connection so either there's an error in the drawing or 12SJ7 is the wrong tube for that position. The heater connections for the other tubes look functional, but the center tap of your 12V heater winding has to be connected to something else or this wouldn't work. Take a resistance measurement from pin 8 of the 6L6 to ground and see what you get.