Hello!
I have studied psychology and consumer behavior, and have experience in online marketing, which seems to be in line with what you require.
The first thing you need to do is to start building a potential customer base, via either Social Media, mailing list, etc. We'll talk about how to present your products in order to increase followers and improve sales. I can also help you set up a social media page, website, newsletter campaign, etc if needed.
For more details we'd have to talk more about your business plan - what exactly it is you're selling, what's your target audience, etc.
Let me know if I can help,
Tony