First time flowering

Just put my 2 girls into flowering over the weekend.....How long til I see a sex? Its been pretty hot in the attic, hope I didn't create any hermies. And what about pruning and trimming. I get differnent answers from the internet. Both are short and kind of bushy, light doesn't get all the way thru to the dirt. How much to prune or to just trim the leaves?
 
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