Reptiles as a whole are pretty easy to clean. A lot depends on the size. The larger ones would be comparable to cleaning any small game bird, while the little ones would be more akin to sunfish, though they don’t have pinbones.
Most animals are similar in anatomy unless you’re in Australia—God seems to have populated that continent to confound our petty nomenclature system.
In reference to your last comment on strange animals of Australia; I give you The Duckbilled Platypus, an egglaying mammal!