Hi, it's my job! I can help to update your Drupal 8 site with Composer and Drush. I know how to do this with proper update procedure from contributed modules to Drupal core. Please message me to get started now.
My bio: I'm a Drupal themer/developer, I have over 8 years working on various Drupal (D6-D7-D8) projects from theming (Design, HTML, CSS, Javascript) to development (PHP, MYSQL, Drupal). I can create new themes and new modules, fix theme issues and module issues, create and upgrade Drupal sites, also suggest the best solution for Drupal site owners.
Many thanks,
Hoa