Underground Writers Network Forum Advices for a new author

My name is Shir Guez and I'm a new indie author.

I published my children's ebook on Amazon 10 days ago.
I got 4 reviews from amazon's top reviewers (average 5 star rating) but I have difficulties to market the book from now on.
I'd love to get any advice (seriously, any advice!) from experienced or new authors, that have published children's ebook.
Maybe advice about recommended websites, influences people to reach to, etc. 

Best regards,
Shir