You should be fine, having said that don’t use your shiniest race rubber !
When you first give it a go try setting up in a door way so you can support yourself on the door frame. Also helps if you can enlist a willing helper just to steady you from behind (ooer).
The first thing you’ll notice is if your saddle is too high (or your hips rock for another reason) as its pretty much impossible to ride them if you can’t keep your hips still !
There are some really good pyramid training sessions around based on cadence – I think I have one for Garmin somewhere on the pc if you need. my email is in my profile