Hi kts,
The way that myself and many others have learnt would be...
1. Grab yourself(and buddy) a small foil trainer kite. Something like a 1.5-2.5 meter foil preferably something with 3/4lines. You want something that is going to fly in lightish winds but not make you faceplant when you send it accross the wind wind into the powerzone. Fly this for a fair few sessions until you can keep it in the air while saying the alphabet backwards with your eyes shut. If you get a 7m and start playing with it on the beach you will break it or yourself.
2. Get a lesson with a local instructor. The 1st 1 or 2 lessons are the most important. These lessons are the ones that will save you money on hospital bills and broken kites. The main aim will be to get you safely launching, landing and body dragging.
3. Using the advice of your local kite instructor it's time to buy a kite and Harness (wetsuit,impact vest and helmet highly recommend). Your instructor will happily give you advice on what size kite based on your weight and local wind speed.
4. Remembering what you learnt from your instructor body drag, body drag, body drag and do more body dragging. When you think you are ready for the board body drag more it will seriously help with the next stage. (Don't be tempted to fly your big kite on the beach it will end in tears


)
5. Buy a large board (I'm 80kg and use a 145x45). Take the board out in the water and start trying to get up. You will fail a lot and lose your board a lot (glad you can body drag like a pro now aren't you)
At this stage it's very hard to analyse yourself as you are trying to concentrate on so many different things from board position, kite position, leg position, bar pressure etc
6. Go back to your instructor explain what stage you are at. He/she will be able to quickly point out what you are doing wrong and point you in the right direction.
7. Get in the water and have fun.
You might be one of the lucky ones who gets up and riding straight away but most likely you will be like everyone else. Don't get demoralised if it takes you 10+ sessions to get up you will when it all clicks
After a good session remember to remove the massive grin

as people will thing you are crazy.