Can WordPress do the following...

Go with the word press. It can do all the things that you have mentioned. It is a very user friendly and interactive CMS used for creating a website.

Wordpress is good choice. You can find many tutorial videos for example on Youtube. What website do you want to create? I can recommend to use pre-made theme, it is the simplest way for beginner. Check this one for example https://www.templatemonster.com/category/airline-tickets-wordpress-themes/ You will need to find suitable variant for you.

WordPress has all the features that you have mentioned. it has different plugins for different purpose, moreover, if you want some additional features you can customize your website and can make plugins for the same.

My Friend uses WordPress CMS on His Hearing of Swertres Blog where he provides to users the best combinations and Tips. He manages all of your mentioned Works. So, I think yes you should go with WP.
Refs:
https://wordpress.org/

Allow Users to register and login;
Store said users Data/Links;
Fetch/Pull information from other sites identified by users.

I highly doubt that WordPress can do this with free plugins.
Keep in mind that you will need large investment in WP development.

How to Make a Multi Vendor or Multi Seller Marketplace eCommerce Website With WordPress - Like Amazon and Flipkart - 2018 - An Online Store, Complete WooCommerce Tutorial, using Electro WordPress Theme, WooCommerce and Dokan Multi Vendor Plugin.

https://www.youtube.com/watch?v=pBdKYID3-yM