Based on my personal experience, I would say that the dough would still be very sticky and tricky to knead by hand. I found a bench scraper very helpful in my kneading process of 25 minutes.
When I attempted this milk bun recipe, I laid them out on a sheet pan with roughly a 2cm gap in between each bun and they expanded and puffed up during the resting time. However, they did not rise noticeably higher than other bread recipes I have tried before. If I were to attempt the recipe again soon, I would just place them in a smaller pan and with less space in between each bun to allow them to rise higher instead of wider.
Keep on working, great job!