Welcome to the club. The Cannondale F7 is a nice bike with a fantastic frame. No doubt you will want to upgrade some parts at some point in the future, and the F7 is set up well for that.
Bike fit is a complicated issue. I’m 6′ 2" and have ridden M, L and XL frames. There are differences in cockpit and crank locations, but with aftermarket parts you can make just about anything fit. That said, there are many good online tools for determining the "best size for you." I’d start there, and don’t sweat it if it isn’t perfect out of the box. Tuning your ride can be a rewarding way to get in touch with your bike.
Post some pics of your bike when you get one. We always like to see shiny stuff!