Hi!

I'm really interested in learning how to windsurf and looking to buy some gear but I have no idea what size or what's good for beginners. Any help wold be great!

Thanks

Here's something to read.
http://boards.mpora.com/how-to/beginner-how-to

It gives you a good idea of sizes and it does say what adjustment to make if you are a woman/lightweight.

My own opinion is to buy a good lightweight rig (boom, sail, mast) because a good sail helps beginner and expert alike and you wont need to change it as you progress.
Where you can save money is in buying a cheap second-hand beginners board to learn and progress on. You would then be selling that to get a smaller board that you could still uphaul, but was easier to carry and more dynamic for turning when on the water.
Masts are expensive enough for it to be worth trying to get away with one mast. A 430cm mast usually takes sails from 5.3m to 6.2m. One mast one boom and two sails is a good setup for learning.

It will seem to take a lot of effort when learning to windsurf, but once you get beyond the beginner stage, it gets a lot easier physically. You then let the wind do the work for you, to manouver the board into the right position and to lift you out of the water onto the board.

don't bother...
have you seen kiting?
or are you retired.
lol.