I know this question has been asked before and I know about org-roam, I am just not sure if org-roam is the right solution for me. Right now, I use one big org file to take notes which I export to pdf. This works nicely, but it would be nice to also have access to the concepts in the larger org file at a granular level (ie. bite-sized notes which reference one another and are organized based on their subject matter). I would also like to tag information that is not in org format, if possible. I was thinking that org-roam & org-transclusion could be used to make main subject files, while org-roam could be used to make a link to an embedded pdf that comes from the concept I am referencing, when I don’t need to explicitly review the material in whatever notes I am taking. Has anybody done anything like this? Any tips are appreciated. Thanks.
org-roam can do what you want.
If you have one big file now you can use org-roam to create nodes for the relevant sub-heading which can be linked to from elsewhere. These nodes can eventually be moved to their own files when you need.
You may also find the roam ref feature useful for external references/documents.
What about if I want to capture multiple pieces of information as different nodes under the same headline?