No worries about the sideways pic. We have no idea why some pics does that
When will you add water?
When you do put a sock or cloth over the metal end of the hose. Make sure the hose is right on/over the main drain. Do NOT stop the water once it starts filling!! If you need to slow it down so you don't have to get up in the middle of the night you can do that but do NOT stop the water until it is in the middle of the skimmer face.
Do not allow the spa to overflow into the pool until the pool is full. Any kind of water running down the side of the new plaster could cause streaking.
You water might have a slight green tint. This is VERY normal as the plaster cures and the water gets balanced.
Kim