1. Upgrade your web hosting to MySQL 5.7 and PHP 7.2 at minimum.
2. Copy the files and database to web hosting which supports the above minimum.
3. Hire someone to do it but you'd still need to have hosting which meats the minimum requirements.
With option 1. Can I just use php 8.4 and mariadb 10? Are you saying the imported mysql db doesn't have to be the same as the one that is on the server that xenforos will be installed on? Xenforos will be able to extract the information? Also I think the db is over 10gb. Is that going to be a problem?