Hi Jamie,
welcome aboard! Congrats re. the second child btw! How old are you? What were your max weights the last time you did SS?
Your goals could well be achievable in 8 months with solid work, a good plan, good rest (this might be hard right now) and nutrition, and no major injuries or life interfering. Staying under 12%BF is an understandable goal but it might limit the speed of your gainzZz. Just saying. Now go lift some weights!