iPhone 12.

Is the display ok? If so, go get the glass in front of the display replaced before the screen incurs damage.

It is safe as long as you put a case on to prevent the glass shards from piercing your hands. However, it is advisable to get the back glass replaced, especially because there are people who use a laser to remove the glass and put a new one on for cheaper than normal

Try getting the iPhone 12 or 13 if you can, but a 11 is still good.