Remember, if you find a salsa, red or green, that you like. . .
If you find a salsa that you like, salsa as in the jarred stuff you might put on tacos, burritos and the like, you can blend that until it is smooth and use it as an enchilada sauce.
I like to buy some mild green chiles, like "Ortega" brand, place them in a blender with enough chicken broth to liquefy to an enchilada-sauce consistency, season with some salt, pepper, garlic (or garlic granules) and then use that for green enchiladas; if it seems a little bitter, add a little olive oil to taste. If the enchiladas seem hotter, I thin with more water and then thicken it just a bit with some flour and use that as my green enchilada sauce.