Have you thought about having a pre-conception meeting with your dr? You can get many of your questions answered there.
Conception rates are so different for every couple. If you're under 35, most doctors won't begin to be concerned about infertility until you've been TTC for a year.
There are many old wives' tales about what will help you conceive: positions, beverages, diets, etc. But, as I said before, it's different for every couple.