Hi turtt,
My recomendation is before buying anything or reading anything that any one has written, you start with the Torah, right in our bibles, the first five books. Study them, get familiar with them, and you will see how much your understanding grows when reading things Yeshua says or Peter or Paul. That should be your foundation.
Then when you have that down ( and did you know Jews as well as Messianics read through the Torah in a one year cycle, over and over again, because it is the foundation, and without that foundations everything else falls misunderstood.
Try this place, this will help you to know where we are at and give a nice prospective to the torah portions.
http://www.messianicisrael.org/Newsroom/torah.htmlHere is a place you can choose to read the portion or to listen to it, even on the go on your mp3 player.
http://www.torahbytes.org/Check out the resources links here
http://ffoz.org/downloads/torah_study_resources/index.htmlYou will have to join, but it's free, and you can get a weekly torah commentary sent to your email. Also the Messiah magazine they put out is pretty good.