Oh this sis so much better!
On Day 2, do not miss Bruarfoss. It is right there in the Golden Circle and does not take much time.
On Day 3, if you are up for it the zodiac boat tour at Jokulsarlon is a blast! We have done it a few times and just love it.
On Day 5, the Hengifoss hike is beautiful and not hard at all. It is on a somewhat steepish path, but it is paved and you just go at your own pace. Once at the top, you can sit by the creek that runs off from the waterfall and have a picnic lunch. When we have been there, there has also been an ice cream truck across from the parking lot;)
On Day 6, you could do Katla ice cave as that is a year round one. Right near Vik is Reynisfjara black sand beach which is very interesting. There is a warning system as you walk to the beach, so stop and read it and heed any warnings. This beach has a lot of sneaker waves, so you have to be very careful. Do not go into the cave, and do not go below the water line in the sand, and of course never turn your back on the ocean. Not far from there is Yoda Cave, that is interesting. Both of these have pay parking lots now, which is new. Also near Vik is Solheimajokull which is a glacier that you can just look at, or do a glacier hike. The glacier hike is not difficult at all and is beautiful! If you want to do this, book directly through the operator at https://www.mountainguides.is
Day 7 is a bit confusing as Reynisfjara is right by Vik, so it makes sense to do it from there. BTW it is the Golden Circle, not the Golden Ring;) There is no Golden Ring, I think you are thinking of the Ring Road. I would stay this night in or around Akranes. This would give you a jump start on Snaefellesness the next day, but also would make the drive from Vik to there not terrible as it is only about 3+ hours drive time. So a few stops to break it up, go to Akranes and enjoy a soak there that night and then head out in the morning. An alternative would to be push a bit further and stay in Borgarnes, which would make the drive about 3.5 hours. If this were me, I would opt for Borgarnes just because it makes the next day easier. Also, in Borgarness is the Settlement Center which is quite interesting.
Day 8 If you start in Borgarnes and do Snaefellsness peninsula (all the way to the west, not cutting up halfway) and then back to Borgarnes for the night, it is only about 4+ hours drive time. If you start in Akranes, it is about 4.5 hours drive time. The two towns ae pretty close as you can see. I would stay in one of these towns this night instead of trying to get back to Reykjavik. Just do that in the morning and you will still have all day for Reykjavik.
Day 9 Head back to Reykjavik. If you want to soak, Hvammsvik would be ideal as it is only our way back down. Stay in Reykjavik and see anything you missed on the first day and then get ready to fly home the next day.