Most inversions are just visual. The vertical G forces pull you down into your seat so it feels like normal gravitational force, like what you're experiencing right now at your computer most likely (that is, unless you're in space or hanging upside-down currently or something
). If you've ridden a roller coaster before, think about the forces at the bottom of a drop where it levels out and the forces suck you into your seat at forces stronger than normal gravitational forces. That's what a loop feels like but for a sustained period and everything spinning around you. Some aren't even that intense and you don't feel the stronger forces, just normal force with the visuals. That's all roller coasters are, force and visuals.
I actually took my friend on her first looping coasters at Dollywood in August. I got her on Wild Eagle and Mystery Mine. She said she enjoyed Wild Eagle the most, and just about killed me for letting her get on Mystery Mine (even though I TOLD her several times that she'd hate it). She was terrified on both of the loopers, though. The things she said she didn't like were the Mystery Mine's hang time and Wild Eagle's loop.
My advice on their loopers:
*Wild Eagle- Least intense, feels like normal forces holding you in your seat during inversions, maybe a tad extra if you ride in the back. This is the first coaster I would recommend you try if it's your first looper. The views are spectacular and it feels more like flying than riding a roller coaster. It's my favorite one there.
*Tennessee Tornado- The forces pulling you into your seat on the three inversions on this ride are nuts. I honestly think you could stay in through those inversions without the restraint because they're so intense; the restraint doesn't bash your head either. I find that Wild Eagle feels safer and smoother so that's why I recommend it first, but this wouldn't be a bad choice either. It's my favorite Arrow looper just because of that crazy intense loop out of the drop and that iron butterfly towards the back of the layout.
*Mystery Mine- This thing is awful. Fun, but awful. The shaping before the inversions even start makes it so rough and headbashy (Is that a word? It should be
) that you might not even want to do a 90+ degree drop and two inversions after getting beaten up. The drop pulls you out of your seat (maybe you like that?) and the heartline roll out of it you barely notice (though it might bash your head once) and honestly, the dive loop is the worst part of the ride. The forces transfer to being all negative, leaving you suspended by just a hydraulic restraint. Even worse, the padding on the restraint is just on the insides, not undersides, so it leaves almost all your body weight on your shoulders, the forces
conveniently transferred through a hard plastic-y bar that hurts. Definitely do the other two first before making a choice about this one.
Another piece of generic advice I give people that are new to inversions before they ride is to look forward through looping elements (all of Tennessee Tornado's inversions, the second half of MM's dive loop, Wild Eagle's first and third inversions) and sideways through rolling elements. (Mystery Mine's 1.5 heartlines, Wild Eagle's second and fourth inversion)
I did my first inversions in the dark on Rock 'n Roller Coaster and Flight of Fear, and then moved outdoors with Son of Beast being my first outdoor looper where I got both the force and visuals. Rock 'n Roller Coaster's weren't bad, but it took me until the other two to get over my fear of them. Sadly, though, Dollywood doesn't have any dark coasters, so I'd advise either Wild Eagle or Tennessee Tornado first. That's how I feel I would have handled the situation if I were new to inversions at Dollywood.
Best of luck! PM me if you have any questions, I'll be happy to answer them for you!
And inversions or not, have fun at Dollywood!