I have two lady friends that claims to have the time stone. Personally, I think they have been watching too much infinity wars, but, if this is true, and it might be, they might realize these powers I am about to share easiest, of course.
The first is 'time compression.' This would be where you may do things quickly with your mind. This would be where you could, for example, think for a long time, and, then, maybe in a telepathy dream, learn things, or even test things? This would be where you might want to include people too!
So, to do this, you would want to boost brain activity by charging your brain functions through hyper activity. This could easily be shared, so as to form a network, where you may communicate quickly, maybe even to the point of light speed where electrons break down, and, then 'swap waves of brain activity?'
Now, this would be down to speeding up your mental activity through submitting to your real impulses. That would mean, cancelling out left hemisphere operations, and, other operations that consume power, or, even include left hemisphere essential functions, and, cancel right ones? Of course, this would be where you just need to keep your heart beating and lungs functioning, or, boost fuel consumption to the point of waste in your brain, to get the most out of each impulse?