Ask HN: Where to seek for technical and economical guidance?

For the past months i built a website / web app which i want to release in the app stores soon. However this is the first time for me. There are several options to promote an app these days but i just don't know which way to go - where to invest smart.

Because i think that my app could perform quite well and has a lot of potential i want to do this right.

What i need right now would be someone who has successfully released an app with 250k+ downloads or works in the industry and has a lot of experience to look at my project and give me his opinion and some advice which steps i should take right now.

Furthermore i am looking for some expertise in:

- scalability - performance - advertising

I'd be very thankful for some suggestions where to look for an professional/experienced person that i willing to look at my project.