good on you odelea01 for wanting to give it a go

it will change your life . as for boogie boarding for get it

as for surfing unless your long boarding you aint surfing any way

or go straight for the good stuff . seeing that you have no time on the water it will be alot easier to learn to kite . it will only take days to learn to kite but windsurfing will take a life time . just get your self to some flat water . look for someone kiting or sailing and go and have a talk to them about it ,most of them will be help you.
just be aware of people with links to shops as they will have you believeing that there gear is the only gear . go talk to someone who does it for the love it . try heaps of gear then go visit the shops with a informed opinion and tell them what you want , not what they want to sell you . goood luck and get out there