Lainey, welcome to the forum! Being that you were an XP user, as I was for almost eight years (still am on my notebook), Windows 7 will be a breeze to learn. At first, I was afraid to take the leap myself, being that I skipped Vista.
Then I joined this forum, as you have, and have never regretted moving forward to Windows 7, as well as 64 bit computing. You'll get used to things faster than with XP. And, if you use your computer for your job or school, you'll be more productive in both.
BTW, I came close to being a Mac user myself a while back, but the salesperson, apparently inexperienced, used his presentation to bash what I had, rather than seize the opportunity to close on a sale. Looking back on it, he probably done me a favor.
I hope that you find this forum a good place to learn. There's plenty of friendly, professional support here. As well as tutorials & the newly created Free Software Database, many useful, essential & easy to use apps covering almost every need, at no cost to you.
Best of Luck,
Cat