Where do you find slime chunks?
The most efficient way to find a slime chunk is to go underground below Y-40 and create tunnels big enough to spawn small and medium slimes. A trick that you can do is to click the key combination f3+Q followed by f3+G. This will show chunk boundaries. After tunneling through long enough, you should be able to find a chunk that can spawn slimes. Remember that slimes count towards the mob count, and if there are too many other monsters in the area, then slimes will not spawn. Once you find a chunk, you can expand the space in the chunk to spawn all types of slimes.