How to go about overcoming your fear of messing up your first investment?

[Pierre Thernize]

I have resolute to make my first investment purchase in 2014. I have chosen my market "downtown Newark". I have set aside some emergency funds for what will go wrong after I purchase the deal, but I wonder how much is a good number? How do I overcome the fear of losing it all on my first deal to the point of bankruptcy? Thanks in advance and I truly appreciate any help!