Fairly simple, I am just too new to custom objects/triggers/apex.

Basically a field in the opportunity that shows the number of Products that are in the opportunity.

IE for the screenshot attached, the field Opportunity Product Count = 3

Hello.

So we want a section in the Account that looks EXACTLY like the Account History section, except it will only show for the MRR field and the section will be called MRR History.

Now, I am at the very very very beginning of learning apex/visualforce/salesforce development. I consider myself an intermediate but not-quite-yet advanced salesforce admin.  I know workflows/validation rules/process builder etc.

Is this something that I can just "learn".  The only "coding" I know is from matlab.  I am not familiar with java.  

Let me know if you think this is something that is just too advanced for where I am.