43xMHz band is sometimes crowded. Cheap receivers are sensitive to blocking. That is, any transmitter near by may stop your receiver from working.
Edit: I hear NRF24 chips are not easy to get working without library, but they work with a library. I have tried ESP-01/8266 modules lately, they seem easy enough. But there are so many models and sellers that it is not easy to start. I was able to make a connection with AT-commands, so they can't be too difficult.
DocStein99: Your modules look just like the modules I had problems with. I cannot recommend them. But, like I said with good 433MHz modules you'll have no problems.