Hi @Marta-Alicia0 I think your listing looks perfectly fine and you have a number of very nice reviews. The photos aren't bad- they could be done a little better- the shots themselves are fine and show what the place looks like but the lighting could be a bit more dramatic to show things off better. But I don't think that's a factor for you in not getting bookings. What Pete said about the decor and the religious pictures and symbols I wouldn't concern myself about too much- living in Mexico, I know that lacy curtains, bedskirts, and tablecloths are very common in Latin America, it's the style. But a more non-gender specific, and more modern style might be better- men aren't attracted to frilly things, and most younger people aren't, but maybe you prefer to host women anyway.
You have every right to have whatever pictures, crosses, etc, you want in your home, and that also is quite commom in Latin American countries, but Pete is correct, that not everyone would want to stay in a room with a large painting of Jesus over the bed. But that's okay, too, it's your home, just realize that not all guests are comfortable with religious symbolism.
I don't know what kind of competition you have in your area as far as what you offer at the low price you charge, but maybe it's just the time of year? I was also getting worried, because I hadn't had a booking since May (but I almost never get bookings in the summer here-it's just too hot and humid for most foreign travelers) and usually start to get them by October. But I just got one today for late December, so hopefully more come in. It almost seems like once you get a booking after a long period without any, it somehow sets the ball rolling and more come in. I think the search ranking also goes up a bit when you get a booking, so the listing becomes more easily visible.