Leaking Coolant

I would go to your local parts store to get their radiator pressure tester that should be available in their tool loan program. I would leave the oil plug out and pressure up the cooling system. It might be a good idea to remove the spark plugs also. Hopefully that will lead you to the leak instead of just guessing so you will know what area you need to fix.

There are a lot of places the leak could be coming from. One of the commonly overlooked places is the timing cover housing.