I looked up your shop. Your fitting was done by SICI (Serotta) trained fitters. That doesn't mean that your fit is geared towards any particular brand of bike, it helps the fitter determine the best geometry for you. Many fitters are SICI trained but sell brands other than Serotta. A 2-3 hr fitting is not unusual, anything less is considered a sizing, not a fitting. I'm sure you paid a good price for the fitting.

I'm not a good one to speak to electronic shifters but I'm in agreement with the others. Learn how to shift on hills first. I think once you get a road bike and get a feel for the shifting you'll be pleasantly surprised how easy it is.

Be aware that if a stock bike has to be fitted with adjustments such as a shorter and higher rise stem or lots of spacers to raise the handlebars, saddle all the way foward, etc. the bike doesn't fit. Such adjustments will affect the handling.

One other thought, when I moved to Colorado from the midwest I wasn't used to the longer downhills and mtn passes we have here. They scared me as I wasn't sure how to handle them. I learned to ride in my drops but my stock frame, with adjustments to improve fit, was twitchy and unpredictable. In comparasion, my custom frame is so stable on downhills that I no longer feel intimidated, even on long mtn passes with switchbacks. I attribute that to the fit but also to the custom built wheels that aren't so stiff that I get bounced all over the place.