First off lay off the speed lol, just joking, take a breath between words though. I dont think that it really matters what you grow first as long as you are in the know, a strain is as difficult as the next if you know what your doing, my advice though is to get some cheap seeds, that way you dont lose much if you do kill em, .
If you do kill em it wouldnt have matter what seeds you got as they would be dead anyway, so get some cheap ones, and some more expensive ones, then use the cheap ones as a buffer, start them 4 weeks before the good ones, that way you will see any potential problems in the cheap seeds so you can avoid it with the good ones.
White Widow is a good smoke though. I'm growing a little of that myself