I finished the 2nd roof panel yesterday and installed the first half of the roof today.
I nailed a piece of scrap wood to the bottom edge of the first panel. When I lifted the panel into place, I rested the one end on the top plate.
I used my big C clamp to hold the top piece of the panel in position, while I toe nailed it in place. Then I put a timber lock screw in the end to hold it in position. I went down to the deck and added another couple of timber lock screws up through the top plate and into the eave. Note the rope I used as a safety line to keep the panel from falling too far, if I dropped it!
Here is a view of the first roof panel in position.
The second panel overlaps the first panel at the peak. I pushed the second panel up into the loft over the side wall. I used some rope to hold one end of the panel in position while I worked on the other end. (I've been doing this all solo.) I used the C clamp again to hold the panel in position while I aligned the peak.
Then I drove in more timber lock screws to secure the second panel.
Here is what the first half of the roof looks like from a distance.