Those tyres are prefect to start out with, remembering that you more than likley have a 14" front rim so you'll need to get 12' ones.
Most mini motard run 2.15 front rim & 2.50" rear rim, just makes the tyre sit on the rim nice (better grip) Also if you think you'll be getting into it might be better to get some Dunlop TT92's they stick and last ages!