@Anita Anand
The feelings you've got going on, and the fear itself, are all part of the growth process.
I would suggest just going for it. The numbers don't have to be perfect, and I have recently learned something called GETMO: GOOD ENOUGH TO MOVE ON
Sometimes we have to stop analyzing and say GETMO.
Other suggestions to consider: share your deal numbers for help in analysis, get a mentor, get a partner, or invest in a different market? But don't stop taking action. More time in the forums is not the answer.
My wife reminded me yesterday that exactly 3 years ago we bought our first flip. It was a disaster, but I learned so much from that and from each of our deals since then, I have no regrets about jumping into this. In about 3.5 years we have done about 25 deals total. Some winners, some losers, but no regrets because it's been a great education. Just like others have stated, with experience comes a certain grit, and eventually you realize it's not a total roller coaster after all!