Versions of Microsoft Excel ??

So I’m currently using a 2015 Lenovo y700 laptop to trade off of and I’ve been trying to get started in excel to start performing my own Analysis and crunching numbers . Only problem is the version of Microsoft excel I have has no features such as the ones I’ve seen on YouTube or read about and I can’t find anywhere on this laptop that it states what model of excel I’m currently running . Their is no data analysis tab and it doesn’t even give me the option to download anything extra into excel . My system is windows 10. Could y’all lead me in the right direction as to what I should do to get the full benefits of excel? Am I going to have to upgrade and pay the monthly subscription fee ? Any advice would be greatly appreciated !