Congrats on your first grow!!! I have had a lot of fun doing mine and it's very rewarding seeing changes take place - It seems to take forever and a day to finish though, I feel like I have been in the flowering stage all my life!!!
The plants look good to me - rather than chopping the main cola (I though about that with mine) prior to harvesting which could shock the plant badly, try and get some more light to the lower buds.

Well done!!! All the best - Hall