@alpha tech
I recommend you take a look at some of these rockets, and base your design on them: https://en.wikipedia.org/wiki/Small-lift_launch_vehicle
Particularly this one: https://en.wikipedia.org/wiki/Lambda_4S As it's probably close to the size that you will be building.
And like many have said before, start small, and work your way up slowly, don't go big yet, or you'll literally crash and burn. I mean, you want to go into orbit!
Some of the best engineers on the planet have been doing this for decades, and they still make mistakes, please learn from them, ask for help from actual rocket scientists who have years of rocketry experience (Not amateur rockery, think NASA level, you're talking about building an orbital rocket, ask for help from people who build those for a living), the KSP forums don't count (Unless there's some on here) do your research, and take as many safety precautions known to the human race as possible, don't become arrogant, or you'll get yourself hurt, or worse. This is dangerous stuff and is one of those things you don't want to screw with.
With that being said, I think this is a pretty cool idea, I wanted to do something similar a few years ago, but we didn't so much as make a palm sized rocket, but that wasn't because of safety issues, I just couldn't figure out how I was going to get money for any of it, and I was naive to a lot of things.
By the way, how many people are working with you? What's your gameplan/milestone calendar, how much money have you put towards it so far, and what's your progress?