Hey Q, I've seen 50-60 year olds climbing much better than me. If you are in reasonably good shape you can do this. Most good climbing gyms have walls with different degrees of difficulty.
The climbers jumping with their fingers are top notch but remember that most climbing is a bout strategy and leg strength. To do really difficult moves takes more agility and upper body strength. If I had to go up by way of pull ups I'd be lucky to get a few feet off the ground.
I'd say get out there and give it a try. They should have someone that can get you started. Hope this helps.
Joe
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*** Today's mighty oak was once just some nut who held his ground! With most men, unbelief in one thing springs from blind belief in another.

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