Congrats! I was very careful with my baby at first too. I didn't baby sit or have any younger siblings so it was very new to me too. I would definitely take the classes at the hospital like the previous post said. I just think the more information you can get the better you will feel knowing as much as you can. I also got the book "What to expect when your expecting" It gives alot of useful information and goes week by week so you know exactly what to expect at the time.
Everyones pregnancy is different so don't get freaked out about others stories and everyone will give you advice and it will get aggrivating. Just let it go in one ear and out the other.
Oh and if someone touches your stomach and you feel uncomfortable just touch their stomache and ask them when they are due! LOL