https://screencast-o-matic.com/watch/cbXn1w2hDi

Godwin I have done a quick demo for you, you can do this to edit just about anything in your template.

select the item you want to edit and right click and select Inspect you can then see the code, and you can in Inspect mode make any edits you want to test any changes, then you will also see the file path and line numbers in the top right if you hover above them.

Once your happy with the changes you can go in and make the edits.

It might be a good idea to load a copy of the craig's list template and rename it to suit and then you can switch between the two while developing the new template, or waort case if you make an error, delete it and start again.

Any dramas yell out.