How to get more customers for offline business?

[Trisul]

My dad has a retail clothing store (offline). I want to help him make more money as he is struggling a lot to pay for my college and medical bills.

I want to reach out to a lot of potential customers who search online for Shirts, Jeans, etc in my district. I'm not in a position to invest any amount of money for this
How do I go about this?

Start a blog on a free blogging platform, SEO it and give the address and contact info in the blog? or
Start a static website on free hosting service, SEO it and give the address and contact info?

I will be putting images of the store and clothing available.
I won't be adding content to it regularly ( so a website?).

Basically all I want it is to use the internet to bring in more customers to the offline store located in India. How do I accomplish this?

I will give 10 points for best answer.

Thanks!!