Its very brave of you to be considering adoption. I dont know your situation, but if you dont feel prepared for it then its a very brave and admirable thing to do.
Your parents might suprise you with their reaction. They may even offer to help out with money. You never know. But its important that you tell them I think.
Hope everything goes really well for you honey, and if you need anyone to talk to drop me a line

Cant say I can give you brilliant advice but I can listen!
xxx