When it comes to speed of velocity, you can subtract time from distance, you do that with increased velocity I can subtract 30 minutes off a 100 mile trip if I go at 100 miles per hour instead of 50. But that really makes no difference to your argument.
The thing you have to get your head around with relativity is that the distance does not change! But the length of distance does change, so you could have a 100 meter distance, but the length of that 'distance' is dependent on the length of 1 meter.
Relativity tells us, and its is confirmed with observations, that the length of 1 second varies from place to place (and not only from SR and velocity, but also from GR and gravity).
The length of time varies, the speed of light is constant, so the length of space has to also vary. Space and time length gets longer in higher gravity or higher velocity, and shorter in lower gravity. In fact, gravity IS the gradient of that change in the length of space (and the length of time derived from the length of space).
Matter wants or tends to 'fall' into longer space, or a lower energy space, (longer space is lower energy). That's why things fall down, and why it takes energy to put things 'up'. Up is shorter space (and time) and down is longer space (and time).
Velocity in that space length makes the space in the direction of travel (and therefore you at that velocity) bigger, or greater length. (you 'consume' or experience more space length over time).
What you need to get into your head is that Relativity is all rubbish.
Its NEVER been shown to work by any experiment.
And it never will, because the hypotheisis and assumptions are moronic.
You can not do this, 140 meters minus 39 seconds equals ?
That is exactly what occurs hidden in the algebra when deriving lorentz transformation.
If the distances change, then the distances change. If a meter shrinks, then that is now not a meter,
Its moronic to claim that matter shrinks in one direction just because someone is watching it from a different location.
And even Einstein agreed in the end, that Light speed is NOT CONSTANT.
Bang goes his theory of Special Relativity.
Time has no relationship with space.
Time is a concept, related to comparing the cyclical motions of objects with other objects.
Space is not "curved" in any way. That is a mathematical construct, therefore its purely only a imaginary construct.
Mathematics is NOT PHYSICS, and cant "explain" the Physical universe in any way.
Math is merely a clever counting tool.