Hello,
I am an experienced admin with no apex experience. I was hoping someone can point me in the right direction, I would like to take a stab at creating a simple Apex trigger on the opportunity object to update a field when a field is changed on a child custom object named Implementations (lookup relationship). I understand that cross object workflows can be done with master deatil relationships, however, I do not want to create a master relationship in this case. Any direction would be appreciated. 

Thanks!