Id say if you can afford it or have a test waiver to go ahead and take the SAT June 6th. I did the same date at the end of my freshman year (just finished algebra 2 and geometry) without studying and got a 1380, ended up applying to colleges this year with a 1540. I think taking it that first time prepared me for the test taking. I found that actually sitting through the entire test, taking it in a classroom with a bunch of other people, taking it Saturday morning, and all those other environmental things were more important to adjust to than the actual content which is pretty easy.