I want to remove concrete blocks from under my stairs, how do I go about this and is it safe?

I’m looking to add some under stair storage in my house but unlike most post and videos about this I’ve seen online my stairs has block walls underneath opposed to stud wall. I need some advice on how to go about removing the blocks and if it’s safe, as far as I’m aware the stingers should be enough to hold the stairs but I’m not a professional so would like some opinions. I’ve attached some images of my stairs now and what I’m wanting to do.