Hi Darren,
The question you ask is a little vague. I'll throw some ideas out on the table, then we can go from there.
The basic idea behind a source is where you found supporting evidence of the person you are profiling.
There are at least two types: 1. Source and 2. Primary Source.
Source: Family History of Darren Bell; Find A Grave memorial ID 111111(add the correct number); Family Search ID, Billion Graves, and so on. These sources are not always accurate or truthful, but they at least help others know where you found the information.
Primary Source: Birth Certificate, Death Certificate, Census Records, Military records, Criminal records and so on. These types are documented evidence found at the County and State level (Governmental records), and more accurate and truthful in nature.
Your Question was: Help with adding sources. That could mean you need help to actually place the source in the source section (field box) Which could mean typing in "Family History of Darren Bell or adding a web site address (URL) example: https://www.findagrave.com/memorial/7736629/thomas-e-draper (Find A Grave)
If the above is not what you are asking, then you can explain the exact problem you are having.
There is a learning curve that is hard to grasp at first and we are here to help.