Hmm..on my horse, I don't jump, but at my riding lessons I jump about 90cm.
If your horse is ready for it, and your trainer thinks your ready for it, give it a go!!! Height to me, only really makes a difference, because it is a taller jump for your horse, but, if you and your horse are ready for it, it really shouldn't be a problem.
Good luck with it! And keep us updated on how it goes!