If you can think, you can become devotee!

Imagine this situation: Suppose you become sick, you loose eye sight, you loose ability to hear, you cannot move your hands and legs and you are bedridden all the time. Is your life doomed? No, even if you cannot walk, even if you cannot see and read and even if you cannot hear, still you can think. While lying on the bed, you have choice to either think of Ram or to be frustrated. While lying on the bed if you think of Ram all the time, then you will attain bhakti and if you cannot, then you won't. It is that simple. As long as you can think, you can be devotee. You don't need external activities to become devotee. To attain Ram, you need to think of Him as much as you can and ultimately, in the end every moment.
Each moment you have choice - to remember Ram or to not remember Ram. Sri Ram gives you that choice each moment again and again. So, by doing jap, yog, pranayam, hearing His pastimes etc, you learn to exercise your choice of remembering Him more and more. They should increase your ability to exercise your choice of remembering Him more and more. If not, then something is wrong.
Another aspect which is simultaneously true is that your ability to remember Ram each moment is independent of external circumstances. So, it is your and only your choice and no external circumstance stops you to remember Him. So, when you can remember Ram all the time, then external actions don't matter. You might be engaging in any activity and still be with Ram. So, just remember Ram and do your duties.

You should always think of Me and at the same time carry out your prescribed duty of fighting. With your activities dedicated to Me and your mind and intelligence fixed on Me, you will attain Me without doubt. (BG 8.7)

Just fix your mind upon Me and engage all your intelligence in Me. Thus you will live in Me always, without a doubt. (BG 12.8)