Improving organisational skills at work

Hi, I work as a project administrator. To my work colleagues I seem very organised but my current method isn't ideal. It is exhausting.. I write detailed lists and end up with a document for each  chunky project / task. The information is so detailed I sometimes can't find what I need as it's hidden. When I am asked to improve my knowledge on something ie read a report I lift the key information I am looking for and include a link if the information is from a website. I then end up with lots of word documents and when I need to refer to the information in a couple of months I can't find it. 

I was recently diagnosed as being autistic and before I start finding out how autism affects me I need to come up with a better way of organising myself so I know where to slot key pieces of information and more importantly it is easy to find when I need to access it.

If anyone has any suggestions as to what I could try or if there are any books / podcasts which might be helpful please do share. Thank you in advance