Rating functionality to existing Wix site

Hello
How are you doing?
I am going to add a rating function to Wix service site and I need help on how to do it. I have searched the video and tried to find a way, but it’s all demo and not the way I want.
I want users can submit reviews and rating and they can see the overall rating of the service. The idea is clear, but due to the lack of Wix experience I can’t even edit the current service page. I am open to anyone’s voice who has a similar experience.
I am STUCK right now and really WANT your HELP.
Thank you first

Hi!

We have an amazing step by step detailed tutorial on how to implement ratings and reviews for your products ( you can open the site that is used in the example in the Editor to work with the template in the meantime and follow the tutorial ! ):
https://support.wix.com/en/article/corvid-tutorial-adding-ratings-and-reviews-to-a-wix-stores-site
&
https://support.wix.com/en/article/corvid-tutorial-capturing-and-displaying-ratings

Wix Community offers you a video tutorial:

https://www.youtube.com/watch?v=HM9t2NOAK5w
&
https://www.youtube.com/watch?v=K7REGt0Oiy8

If you are stuck during the process - feel free to contact us with specific issues you are facing and attach a code snippet/section that you are having troubles with.

Goodluck!

thanks for your reply. Actually I found it https://support.wix.com/en/article/corvid-tutorial-adding-ratings-and-reviews-to-a-wix-stores-site and now implement it in the booking system.
By the way, How can I get the selected item in the booking detail page. I want to show ratings here? What I mean is how to implement this code snippet :
import wixData from ‘wix-data’;
import wixWindow from ‘wix-window’;
let product;
$w.onReady(async function () {
product = await $w(‘#productPage1’).getProduct(); initReviews();
});
in current booking system.
Thank you in advance.