Hey hon,
I've been pole dancing off and on for the last 3 or 4 years. It's a long time...and I've not really accomplished much on the "inversion" side of things, let alone any aerial tricks.
I've got little to no fitness background, and aside from horseback riding a long time ago, I've led a mostly sedentary life. Little flexibility, even littler upper body strength. It took me a long time to understand my limits and I'm still learning about my range of movement, my creative expression with dance, and what works.
However, I'll tell you this: Work out for 45 minutes to an hour. I used to work out all the time for about 30 minutes, and I found that pretty gruelling. I was tired all the time, and workouts became frustrating, I wasn't showing much improvement at all. However, this time, I asked "How long do you work out for?" on the forum, and everyone said they do pole for at LEAST an hour each session. Usually sessions were about 3 times a week.
I gotta say, changing to an hour was hard, but it's really making a difference. I see myself growing stronger all the time. :)
Also, welcome to pole dancing! Trust me, it's an addiction :)