That's actually an interesting problem:
How would you convince a group of Renaissance-era intellectuals that you are from the future and have unique knowledge?
You need some scientific fact or discovery you could show them, that they don't already know, that can be proven quickly using relatively simple tools and equipment. Or you need some revolutionary invention you can build, again quickly with very few resources.
Sure, I know a lot of scientific facts and information. If made the chief scientific/economic advisor to some Renaissance-era king or ruler, I would be able to substantially advance that country rapidly. But imagine being some rando today trying to get yourself a high-level position on a president's cabinet. Imagine trying to just talk your way into that, while having no prior connections at all.
Yes, if put in charge of a historical country I could work wonders. But forget running the country, how do you even get past the palace gate? Imagine walking up to the residence of any president or prime minister today and trying to talk your way in the door by telling them, "I'm from the future and am here to rapidly advance your nation's technology. Please let me in to talk to your president/prime minister."