Page creation

Hi, I am quite new to WordPress.

I have just installed and played around with some themes. My requirement is as bellow.

I have data of multiple locations with categories and sub categories of items. Example, City/area as location, Hospitals/restaurants etc as category, sub categories based on specialty/cuisine etc. News and events related to these places.

I have pictures of these items with data in spreadsheet.

What I’m currently doing is creating pages for each city/area, categories, items, news and events. These is becoming an impossible task to keep up with.

Was just wondering that if there is any way in wordpress where I upload these data directly to the system and then system just renders it at the placeholder in any of the available themes..?

Currently my data size is almost 7000 line items. Creating pages is an impractical way, I feel.

Pls help me with this.

Thanks,
Ashok.