i've never heard of ww being finicky, but it is a good idea to stay away from haze's and mostly sativa strains for a few grows as sativa's and hazes can be finicky eaters, not to mention that some sativas can take upwards or 16 weeks to flower, and for a newb, 16 weeks can be forever and a day to keep a plant alive
i give another vote against growing anything from greenhouse seed company as they're like the walmart of the cannabis world imo.. lots of strains to choose from, but not always of the best quality..
to the op, do you like sativa strains, like an up, soaring, motivational high, or do you prefer more of a couchlock, heavy stoned type of weed?? if you like sativa's, c99 is a great place to start as even though it's sativa dom, it finishes very quickly in under 8 weeks or so..
if you like indica's, there's tons of great ones out there..
sannies seed shop has some great prices and awesome genetics whether you like indi's or sativas..