Sorry, but no, wrong. If you have used non-organic fertilizers, you most likely have killed all beneficials you might have had going on. However, you started with so little that you may not have had much going on in the way of microbial life anyway. You cannot grow cannabis with chicken *** alone. All things you put into the soil that are organic are going to break down and go away. If you did not use lime this year, well, you did not use lime.
Again, I am going to try and encourage you to not grow more plants than you can take care of and/or afford to take care of properly. If you cannot afford to feed your plants what they need, you have too many. Each and every plants is going to require almost daily care. It is far better to end up with fewer plants that have been taken care of than a whole bunch that are allowed to just grow and given any nutrients you can afford.
Did you check out the supersoil recipe? This gives you an idea of what the soil needs....and that is for 1/2 cubic meter. You used just a small amount of chicken manure and that was all. It takes a lot more than that to make lawn soil into cannabis soil. Grasses grow everywhere, are dominant, and WILL take food meant for the cannabis. You really do also need to get some of the wild native vegetation removed.
There IS a reason that cannabis is expensive--you really cannot cut corners or it will be seen in potency and yield. Again, fewer, better taken care of plants are better than lots allowed to go feral.