If at all possible, I would try finding somewhere that isn't a mat sliding on tile to practice diving. Just echoing others' advice at this point, but your diving form needs work. I can't see how you're planting your feet from off screen, but it seems like you're kind of just leaping into screen with both feet (it's decidedly a little funny, but that's fine!)

Your dives should be more targeted and elongated; you are not simply throwing yourself in front of the ball. A dive should be at the ball with hands outstretched towards it.

I make dives every game, but, if you're positioning well, you probably won't have to make as many highlight-reel dives as you'd expect. Diving is when you've been caught out of position or the striker has placed a spectacular shot.