First of all, keep your eye on this forum. Your learn a lot from here 😃 I'm also starting to learn php, slowly over about 6 months now. I don't have a whole lot of time but whatever free time I have I look at the forum and read up on PHP. I'd suggest getting a good book too. I've got PHP Bible 2nd Edition and love it. Just start reading the book whenever you have some time. Also, start creating some scripts and small stuff. You'll run into some issues where you can post them here for help. It will help a lot in the learning experience. Don't start off to fast though, so that you don't get confused. Understand what is happening with each line you code. Ah....lets see, what else... Ah yes, try and keep a life too. PHP is very easy to get sucked into and waste your life away at it. 😉 That's about all I have to suggest at this point. Hope this helps!
[edit] Oh ya, a good text editor that "colors" your code is nice too. I use Dreamweaver MX but there are other free ones out there.