Obsidian organisation filing project - Similar to zettelkasten

Need help to organise an extremely large backlog of links, bookmarks, todos, ideas, notes, etc. There are thousands of items, across many documents, spreadsheets, and other types of files These need to... (Budget: ₹750 - ₹1250 INR, Jobs: Documentation, Organization Design, Project Management, Research, Time Management, Virtual Assistant)