A full size gun is harder to conceal but it is possible. I carry a full size Glock often, IWB in a hybrid style holster in jeans or shorts and a tee shirt during the summer with no problem. If printing is an issue try shirts with a pattern instead of solid colors. Carry position is also helpful but most people are oblivious to someone carrying unless it is printing severely.
Body shape and size also play as a factor for concealed carry so you may have to work to find a rig that works for you. Youtube has several good videos on different carry options, check them out and see what you think will work for you.
Don't question my right to own a gun and I won't question your stupidity not to.
You give Peace a chance, we will cover you if it doesn't work out.