I've started a job with a company that use Salesforce and didn't think much of it until I've seen people trying to master it and make lots of money out of it.

I understand how the version of Salesforce that we have work and I can use it easily but I don't know which version it is, how can you find out which one it is and realistically is it a very lucrative career or side income or it will just be some minimum wage job? Thanks