This is all normal and I have ridden Rollercoaster for years and I love them, but even I sometimes have second thoughts as I hate standing in line as well. The way that I got over these feelings and the idea of having second thoughts is to just do it, and trust me it’s all worth it. That’s easier said than done but once you’ve done it you will want to do it again and again for the adrenaline rush.
The sweating pals and the dry throat is just you being nervous about getting on the coaster because your body is anxious about what is going to happen to you, so that’s just your body having anxiety towards the rollercoaster.
I shake as well and I hate that but the more I think about the experience ahed the more I shake, but that also gets me pumped to do it as well so you just need to get ove the initial barrier. Once you have done that you will be able to stand in line and know that it’s something that you have dealt with before and you will find it easier.