There are an endless amount of sights on the market, but I would suggest a multiple pin (3 or 5 pin) sight for a beginner.....sight the bow in at 20 yards on the first pin, 30 on the second pin, 40 on the third pin, etc.

Truglo carbon XS 4
Trophy Ridge Punisher
IQ bow sight

I shoot an IQ sight, but there are other people on here that will know more about sights than me.

Hope it helped. Best of luck.