I remember my first month of TTC, it's so exciting, isn't it!!! Just going to the doctors and getting folic acid was really amazing for me, lol.
Anyway, in answer to your questions. You don't really need to raise yourself up after BD'ing but it's entirely up to you. If you think it'll help then by all means do so. (I did it for the first 3 months, then got bored, lol).
RE the sperm dying. I think the only time sperm start to die is if your OH only ejaculates once a month, other than that I'm sure he'll be fine.
Finally, missionary position is the best, but doggie style also helps the spermies get to their destination. The only position to really avoid is you on on top.
Good luck!!
