Take a relatively non-complex but not too trivial project that you did in PHP. Do it in Rails and Django both. See how it feels and then you can possibly decide

Take a relatively non-complex but not too trivial project that you did in PHP. Do it in Rails and Django both. See how it feels and then you can possibly decide. I only work with Python but was not sure between Django and micro-framework such as Flask. I did a User Management/sign-up application using both and found Flask to be the right fit for me.