Helping with Coding

Hi, I’m trying to make a code where when I collide with an enemy or a player using my shield, this one gets projected away and takes damage. I can’t find any tutorial showing how to learn to code on Mcreator also with blocks. So if someone could code this and send it, that would be incredible. If someone also knows a site or tutorial showing how to use this script language it would be perfect. Thanks to those who will answer and your help