Have me come with you, I will beat you into getting on.
JK, just get on it, I was exactly the same, I just got sick of looking at them and tried them out, and loved them. And welcome to the site.
I recall going on Space Mountain when I was 6 and thinking that if I fell off the trains, I'd fall forever. Maybe I thought the Earth was flat at that time, who knows.
My first real ride was Raptor. Having played too much Roller Coaster Tycoon before, I thought I'd get nauseous on it. I just got dizzy but the positive G-forces made my neck sore the next day.
If you want to do it the proper way, you can take the easy rides first and gradually move onto the larger, faster, more badass ones. But it's probably more fun (due to increased bursts of adrenaline) if you take the biggest ride you can first... If you're up for it.