Hi Jason, it looks like you've started entering your family tree, which is great. If you upgrade from Family Member to Wiki Genealogist (by reading and agreeing to the Honor Code) then you will start to get even more benefits from WikiTree.
Aside from that, it looks like FindAGrave has a trail that can be followed back to Pvt. Mathew Scott in 1830 (that would need verified with sources, as FindAGrave does not require sourcing).
Beyond that, your best bet will be to build out all the siblings and spouses for everyone in-between and see if it leads you anywhere by linking up to research that others may have already done here. You could take some DNA tests also to find matches that will hopefully link you back to Scotland.
You will notice Hilary greeting you on your profile, she should be able to help you with any questions, or you can always come back here to G2G and post when you feel stuck.
