Hi, no problem you're doing good.
When editing you just select the library point. Then on the left side scroll down through the Edit Feature panel until you reach the table with all tags. Click on "+" to add new tag. Into first field type "ref" and into the second field type the number e.g. "37246'. 

Then remove the "Charter #150569" from the name. 

The actual names that you mentioned are good to stay in the "name" field, but I think the street names should just be removed since that is not their real name.