Blur screenshot as you take it on default screenshot app macbook pro

I recently got the 2019 MacBook Pro and one thing different from my previous Windows machine is the lack of ShareX (a screenshot utility). I like to take screenshots and not have them saved locally to my computer (I take hundreds of screenshots daily for work and send it to other people online, and that would take up a lot of space over time which is unnecessary since I can always just search on the messaging platform for that image). I noticed there's an option to save to the clipboard which is perfect except I cannot blur out personal info unless I save it and then edit the info out in the Preview app. Is there anyway to select stuff to blur out? I heard lightshot screenshot does exactly that but I want to make it so that I can click the screenshot button on my Macbook Pro's touchbar and have it take a screenshot.