Neither version is natural. " You're intensifying the "amount" of the process and not the amount of the information. It's like saying "I greatly fished to fill my boat," or "I made a great use of my boat to get a good catch.
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AvangiIf you truly wish to emphasize the work you did rather than the results you obtained, then say, "I worked very hard gathering information from the internet." (But unfortunately I didn't know what I was doing, and I wasted a lot of time and got very little information.) I'm not trying to be funny, just trying to show that the results are the important thing.