search for beginner topic as all the info you need has already been covered but in a nut shell . .
-play with learner kite in a SAFE area on beach only
-DO HAVE at least 3 lessons by a registered IKO instructor regardless of what anyone says
-THEN go and buy gear NOT on ebay-check it out in person as it may have holes or dodgy repairs etc which will severly impact performance
LISTEN to other kiters in your area for where to kite etc
Lastly enjoy and be safe

oh yeah in your lessons they will guide you to buy the correct gear for your weight, height etc