Scared

So I'm almost 33. I have two boys already 3 and 8. That was with my previous husband. My new husband wants a child of our own and he also does not have any. I really thought I was done, but I want to have a baby so bad with my husband. I forgot all the important things to do to get pregnant (besides the sex lol) and I especially don't know what to do as an older mother. Any advice, comments, suggestions would be so helpful! I am excited to be officially trying :) TIA