u/Apprehensive_Ad_6662

I am on septic. My toilets wont flush, and they back up into the tubs. Sinks drain fine. Tank is empty, just had them pumped. Im thinking, based on research, I have a clog closer to the inlet baffle. Opening my clean out, its full of liquid and we've hosed out the pipes into the house. Water will flow if the cleanout is open. Can anyone advise how to fix by myself? I cannot afford another plumber or septic service. Tyia!