Welcome to the forum
@bovico7245
There are a few "professionals" here on the Board but I'm not one of them. (Except Electrical or some Electronic areas where I was trained.) My audio chops are from decades of experience, and a stint as a DJ many moons ago. I do have 4 Home Theater (HT) Set-ups of various configurations, with one being a full Atmos system = 7.2.4 in a room of similar size to yours. I'll give you some advice as to how to ask the right questions here.
First I need to caution you that the move from a
good 5.1, system to a 7.1, and then onto say a a full Atmos system like a 7.2.4 offer small increases in the experience as you move along, except for well done Atmos soundtracks on Blu-ray (like Action Movies which can truly be impressive). Other sources (at least to me) are less satisfying. Hopefully you can listen to a good Atmos system to see where you are headed with your types of source material, before you jump in with both feet. To me good source material is the absolute key to good sound in any configuration.
To start with most here like to know exactly what your current equipment is (Make and models please), and a sketch of what the room looks like (with a photo or two is helpful). Please define the purpose of the set-up. Will it be for a single listening position, a couch & chairs, or a tiered HT layout with rows of seating?
Another factor is size of the equipment, preference for in walls / in ceiling, small subs, the dreaded WAF
(Wife Acceptance Factor) which can typically trump all recommendations. Basically the more timely info you can provide the more responses you'll get from the team here.
I hope this is helpful.