Off topic:Combine multiple hard drives into one big volume in linux

Question

[ASid]

I am just a very basic level programmer and not a system administrator. And I have to set up a linux box in which there are three hard drives (8TB, 8TB and 4TB). I have to combine them all appear as one. I had no clue about that how to do it. I have installed ubuntu desktop 18.0.4 on it. I have no issues with data loss right now or later. I read that LVM is one option but really i dont have a clue how to do/use that although I have already tried a lot of stuff from simple googling. I would really appreciate if somebody could give me some leads on Howto's for this please. Even if I have to intsall ubuntu server I can do that too. (I said that Because I read somewhere perhaps it has something to do with it too) Thank You