Make a list of the top 10 ‘questions’ you want answered. Post it by your computer and keep it there checking them off as they are answered. Take them one by one – go back and find everything you have regarding each individual question. Check all documents for something you may have overlooked. Re-visit them and isolate them. Perhaps turn off the internet for an hour or so to stay focused. How many times do you start off working on something and end up somewhere entirely different – the internet is sneaky that way :-)
More advice based articles – https://www.createafamilytree.net/while-creating-your-family-tree-take-time-to-listen/
I love helping.