So do you actually have a theme for your channel and an actual topic? or is it simply random anything goes because random anything goes is incredibly difficult to really take anywhere.
Take a look at this thread to get a better idea of how to start up a collaboration https://community.tubebuddy.com/index.php?threads/14/ and I really recommend narrowing down a focus for a collab outside of just growing a channel. No one is going to watch people who only want numbers, people want to be entertained and to learn, so make it about your audience and bring value to them. Don't expect them to give you value