How can I promote for my handmade Truffles ??

You should build your confidence and do it yourself. Why pay someone else. You need to find out the ins and outs of getting your business license if you don't already have it, and insurance of course. You can come up with a great packaging concept and do this all yourself. You will need to probably give away first, but you can target small businesses who can give these as gifts to their clients. Try real estate agencies, beauty salons, etc. Do it yourself....Business is expensive, you need not pay someone else to do something you can learn to do yourself.