Take it slow for the first few laps and slowly increase your speed as you get more confident. However i would remember to keep it smooth as you will last a lot longer.
When you go there again, it should be easier, however warm up again, just to make sure there are no mishaps.
The ring is a special place indeed. One where few have been, some have failed, but some victorious and loved the feeling during it. Id cherish every moment of doing the ring, its something that you may not get to do again if it goes wrong.