Pulling information from a Database to display on live site.

What kind of information is going into the database?
How will the data to get there?
How do you want the data to be displayed? Formatted?

I would start with a basic example first to understand how to the database will work.
Create a text box
User types in text to the text box
User clicks a button
Text is inserted into database
A different text block is connected to the database.

Reviewing this article first will likely help.

https://support.wix.com/en/article/displaying-database-content-on-a-regular-page

A very generic example below for inserting data from text box to database.

function button_click(event){
let newDatabaseEntry = {
‘info’ : $w( ‘#MyTextBox’ ).value,
}

wixData.insert(  'MyDatabase' , newDatabaseEntry ); 

}