Hello dear,
I really hope you will accept my offer, I grant you that will proactively work at my very best to help you achieve your goal.
The little amount asked could make you have some doubt about my competence, so I would like to explain, I'm asking this little because I'am completely new on this platform and I need some initial feedback to start.
(This is a one more reason that will make you being sure about the effort I will put in it, since a positive feedback is so crucial for me in this stage).
Have a good day and hope you will accept so we can start working together soon :D