if that's your first grow, I think it looks pretty damn good. No way of telling yield. If I had to make an honest guess solely looking at height and width of each plant. I'm going to say around 3/4 to 1oz per plant fully dried. This is based on a perfect grow and you let the flowers fully mature. There gets a point where you look at them and go, "holy shit, I think they are done" and want to cut. Refrain from being too hasty, they may not actually be ready and could put on more weight and density in the following days. Pics for example, they both look good, ones ready, ones not quite.