The preparations methods - quite a topic for itself ;o). Basically and really really briefly - the temperature and time of brewing goes down with the percentage of fermentation (and actually color ;o), so
black tea (100% fermented) - 100C water for about 3-5mins,
oolongs (they are inbetween green & black ->10-90% fermented) - 60-80C water for about 2-4mins,
green & white tea (not fermented) - 50-70C for about 2-3mins..
This is basically for tea prepared on one brew, 3,5-4 teaspoons and about 0,55lit of water.. If trying 2nd brew, than only with quality tea, and longer time, higher temperature..
But really depends on the way how you prepare it, how much tea leaves and water you put..
About PuEhr.. I really love PuEhr, but I just don't think it's good for beginners. Sure you can try it, but most beginners just don't like it for its strong and maybe strange

taste. The same it is with Mate - amazing taste, but lot's of people just have to find the way to enjoy it, so few like their first sip (neither did I

)
Storage - make sure, that there is no moisture around tea, so place just above water kettle is not good ;o))), should be dark, cool and dry place. Another thing is, that tea ages. When you don't allow air to come to the tea, the aging is slower and tea would be fresher. And the last thing - tea absorbes smell. So if you put open PuEhr and open Assam in one box, you'll end up with 2 teas which smell like PuEhr, but just one will have the taste. The same if you put any scented tea with the others. So basic rule is just no air income, close it tight, and it should prevent it from smells as well..
So good luck and bottoms up!