I agree with tireiron that those images are merely okay. Action/sport photography is extremely challenging in terms of equipment and skill. Indoor sports takes that challenge up a level or two. Sports Illustrated basketball photos, most often, will be shot with strobes positioned high in the rafters of indoor sporting arenas. You don't have that luxury and please , please, please ... never use an on-camera flash which may affect a player's vision. Indoor action/sports is a genre of photography where proper equipment makes a significant difference between mediocre and good.
I know nothing about a T5, but for indoor sports you need fast lenses and high ISO and a reasonably fast shutter speed. Every arena is different, but I suspect that at a minimum you will need ISO 1600, more than likely ISO 3200. At a minimum shutter speed set around 1/250 - 1/500 of a second. The faster the better. And shoot around F/2 - F2.8.
One of the key photographic elements you want in most sports shots is subject isolation. What means an Out Of Focus background which doesn't distract from the subject. Shooting at F2 - F/2.8 goes a long way to blur out the background. Shooting from under the basket will give you a lot of distance between subject background. The longer the lens the greater the isolation. The 70-200 F/2.8 lens is a great lens for indoor sports. But if you can get under the basket, wider lenses, 50mm, 35mm, 28mm can also be effective tools shooting from low looking up and filling the frame with the subject. In all sports with a ball, puck, et al, you need the ball/puck/et al in the shot for it to be successful. (There are always exceptions.)
On the subject of skill:
Patience is important. Wait for the subject to fill the frame. Shoot at the peak of action, don't machinegun every dribble. Pan/follow the player as you shoot even if your movement is slight. This is especially important when shooting at lower shutter speeds, 1/250 and 1/125. Photography is a craft, the more you shoot, the better you will become (typically).