Please show us, who are not experts in medicine, one example (from internet) of such flowcharts...

Thank you Anton Vrdoljak

I mean software that can be used easily to draw the algorithm flowchart.

https://en.wikipedia.org/wiki/Medical_algorithm

I am not familiar with flowcharts much, but I know that Visio is very popular tool. I am MS Windows user, so I am not sure does it works on Macbook too... Next, it seems how:

https://www.smartdraw.com/visio/visio-for-mac.htm

is also good tool, but is not completely free, i.e. you can only try it for some free period... Finally, using google you are able to find many free alternatives for Visio. Here is one I like: https://www.draw.io/

i think powerpoint or word work well too