To ensure that you have all necessary knowledge and a good understanding of the platform, it is highly recommended to go through several trainings online for which you can use a self-service platform called Google Skill shop.
Here you can find all essential courses that will help you in discovering on Google Search.
We highly recommend starting with the Google Ads Search Certification to get yourself familiar with building and optimizing search campaigns.
https://skillshop.exceedlms.com/student/path/18128-google-ads-search-certification
Additionally, we recommend following the Google Analytics Certification which covers basic and advanced google analytics concepts. https://skillshop.exceedlms.com/student/path/2938-google-analytics-individual-qualification