Which upcoming testing technology or other domain should I learn? [closed]

I have overall experience of years, first 2 years in SharePoint admin and then moved to Manual Functional testing domain. currently its been 2 years that I am working under testing domain. I want to upskill to current/upcoming technology in testing. When I search I always see Selenium with java as a key start but there are more which I am not able to identify as different company uses different tools and technology. I hope any experienced or technical expert can guide me on current or upcoming skill in which I should start and dwell to switch my job.