congrats! coco holds too much water btw, specially when you add no perlite to the mix. Also make sure you don't treat it like soil cuz it's really not. keep it green <3
I wasn't so lucky with popping seeds in it but there are bunch of successful threads/journals on the board. I also heard that pH/ppm meter is really necessary.(and that's one of the reasons I can't really think of growing in coco.) It's also holds magnesium due to some ion exchange or something. Just make sure that you ask experienced growers and learn from what other people have experience *before* you get into trouble with it. (growing journals are pretty awesome in this case)