Miki,
It is so easy to analyze and never pull the trigger. There are thousand of investors and why do some not pull the trigger on some deals while others do. We all have apprehension because we think we will make a mistake. You have to believe in yourself. The most difficult deal is always your first one. Once you pull the trigger on your first one the rest become easier.
You need a mentor to hold your hand to help you get though the first deal. Remember when you make an offer the worst think that will happen is they say yes. Make sure when you make offers you have attorney and inspection contingency approvals so you can back out if necessary.
Do your homework and analyze other deals. I agree with some of the other responses, go to Real Estate Investment Groups to hear and learn there. Just be careful, many of the groups have a guest speaker who is selling there education or coaching. Just go and learn.
Good Luck!