Would appreciate any insight on this

I don’t have an IT background but often during the search for Customer/Client-focused jobs, I find that there is a requirement for knowledge of SaaS tools like Salesforce and Hubspot.
Would you appreciate any insight into

  1. The latest SaaS tools that are being used (and are likely to stay in use for few years ) and
  2. The best place to learn them?
  3. Do I have to take a developer’s course to learn these?
  4. Is there a basic program that gets you ready to understand these tools and you take it up from there?

I am confused, I would appreciate if anyone could throw some light on this. Thanks in advance.