There are many crowfunding initiatives here but few are designed to the purpose that you are asking here, anyways you could always post about her progress in the sport or she could do it by herself, blogging.
Idk, I think that is a good enviroment for that but might be time consuming. It's not like you're going to be crowfunded if the people here doesn't know your proyect at all.
Thank you for your input. Do you have any ideas of how to go about promoting the project on this and any other platforms?
You could use the tag upfundme and contact with them. I'm not very aware of the initiatives that they have but there is something to start, they will have much more experience in this kind of issues.
Here you have their accounts link https://steemit.com/@upfundme