What is a good roller coaster to go on at Busch gardens when you havent been on one before?

If you're talking about Busch Gardens in Tampa....you can try the water rides if you've never been on anything resembling a roller coaster, and you don't mind getting a little wet. The Cheetah Chase and the Scorpion are the smallest coasters, and they're both in the same section. The Cheetah has sharp turns and small hills. Scorpion has a loop, you might want to try it before jumping on ShriekRa, which has a loop about 3 times bigger. And that's after the huge first drop. :) I'm sure once you try a couple you'll want to ride them all. Have fun!