Preparing for HVAC acquisition - best use of time

For those that have acquired a HVAC or other home service business, what would you say would be the best use of my time while in the search/acquisition process? Is there anything you could have done to increase your chances of success once in the business?

Assuming it will take 6-18 months to find the right business to acquire, I am considering studying HVAC (I do not have a license so this may speed up the process), or learning ServiceTitan CRM.

Any advice would be most welcome.