DNA testing puts people into a 'halotype', which helps people find their ancestors (with a bit of luck!) However, it only works down the male line, so you would need a brother, uncle, etc to get tested to help you use this to find your ancestors.
When we ask for your earliest know ancestor, that might be your father or grandfather, or earlier. This helps others who are searching lines close to you to net in, and share information. The more we have, the better the chances of finding a match.
Let me know if you need any assistance using the website,
The more information you can give about the people you mention, the more chance there is of someone else connecting with your family.
Dates and places of births, deaths and marriages all help to place families.
Professions also help.
'My great-grandmother mother was a Douglas from Montrose' does not give many clues to follow up! But a bit of flesh on the bones makes further research possible. But if we are told who she married, what his profession was and where the children were baptised, then we can get to work.
Maybe it is time to update the information in your profile?