I like to watch nutnfancy and Military Arms Channel on you tube just to find out about gun stuff in general. I've found though that for me the best thing is to hold a gun in my hands or rent one and take it for a spin.
For a while I was really interested in 1911s, M&Ps, and Glocks. After taking some time to get a feel for them I realized that I really couldn't stand how they fit my hands. Turns out XDs are perfect for me.