I totally agree with SexyRockStarsWife- I was poling, off and on, for about 5 years before I managed to get the basic invert. Due to... a variety of circumstances, poling consistently wasn't really possible for me. But, I did manage to get the BI, and I still have it (barely). It's not pretty, but it functions. I'm still very pleased to have it, but mostly I work on other moves, I work on strength training, and I remind myself that it's not the end of the world if I don't invert that way!
You are totally suitable to pole dance! If I can do it, you can do it ;) Lots of people don't even attempt the invert until 6 months in.
Have you tried some other upside-down moves? You could work on a CKR or CAR, which also took me a while to get (control in those moves is a B*tch when you don't have the abs to do it! Great workout for your core!), and then you can work on handstands and variations, all that fun stuff! Lots of spins to spin and perfect, lots of strength moves that don't require going upside down (like a split grip leg lift?) and all of those will get you closer to a basic invert... even if you don't think they will.
If you really want pain, too, you could work on a teddy hold. Get you used to it before you try your Scorpio/Gemini ;) lol