Help please!! RE: Web Development

I've been asked to build a website (information system) by a client. The thing is, I've only worked on personal projects and projects for some friends/neighbors. I haven't ever charged anyone for my work.

I would really really like to know how much I should charge for this website? How should I explain the charges? Is there anything else I need to keep in mind?

I'm going to meet this person tomorrow so I don't have much time.

For context, I live in India.

Thank you for your responses in advance!!