Extending wp_user and user_meta tables

I’m relatively new to the WP development and want to hear from pros on your opinions. I have a development project based on WP or at least my goal is based on WP. There is a lot of information I want to keep in the database that is not available in WP. First table would be user_meta and wp_users. I would like to hear from you that the pros and cons on either extending these two tables to suit my purpose or creating a table and link the user to those extended information. I have a concern on extending wp_user tables because of if there is any DB structure change in WP, it might affect my database also. Other option would be creating new tables for my own and link the user_id as FK to the new tables. I am kind of more flavor toward creating my own extended tables, but will appreciate your opinions.