how to add code after startup to restart docker issue

Hi I am totally dumb to code, but I need to run this bit of code after pydpiper starts up. I can follow steps if they are written out for me, cut and paste etc.

sudo systemctl restart docker

rather than log in using SSH , which I normally do, I want it to run after a small delay say 1 minute after initial startup. Saiyato has helped me to get to this stage and make the 20x4 LCD work, but docker starts twice which corrupts the screen info. After it restarts it works perfectly for me.

so if you know could you put it in plain english how to do this and where to put it [careful] eg which file and where it is etc step by step.
thank you