It's very simple bro, just gently bend the tallest stems down and away from the shortest stems, this will force the shorter ones to grow taller!

Second week of Flowering, stretch is gonna start, I won’t do any training. It’s a bit too late now, you shall have done this during the Veg period bro.

Thats a dificult question... i would start slowly in spreading the Mainbranches and bend them spreaded. your goal is to help the light to get everywhere. So there is no " iron Rule" how to do LST. Look at your Plant follow her and look wich direction she wants to go at all, bend the branch ( softly) and bind it. But i wont do it way longer than second day of flower... So next time you planing Lst.. start in around week 3