You are at the pinnacle of mental prowess. You have a near-limitless capacity to acquire and master skills of any variety, create genius inventions and techniques, and attain within minutes what mastery a lesser man might in lifetimes.
Moreover, you require no outside knowledge to begin learning these skills, so long as you have sufficient materials. Spend a day in study and develop interplanetary space travel in your backyard. A week, and travel between stars and galaxies. An hour, and develop a cure for mankind's deadliest illnesses. While the most obvious application of these abilities is in science and technology, you are by no means limited to it.
In mere minutes of observation, you could become a master of martial arts. and in hours be creating fighting styles of your own. A day's practice could make you humanity's greatest detective, its finest doctor, its most talented artist, or its most charismatic leader. Your rate of progress is dependent on the difficulty of what you are studying, fields such as magic can still take you months to years to master completely. You are however limited to what your body can handle, this power by itself does not allow you to surpass your physical limits or grant you the ability to wield supernatural powers.
When you acquire new skills and expertise, you will never forget or become incapable of your peak accomplishments. With time you will inevitably become a veritable Swiss Army Knife of incredible scientific knowledge, incredible feats of physical skill, and much, much more. In a matter of months, your technologies could advance civilization to its extremes, or make you into a transhumanist god. Nanobot enhancement, genetic recoding, cybernetics, quantum computing, and more may within mere days be in your grasp. Who but you could imagine what might be possible in a year, or a decade? Your talent in all disciplines is quite literally all-encompassing. You are become the overman.