Hard to put to sleep

Hi mummies. Since newborn i've been cradling and patting him to sleep because that was the only way we could make him sleep. He doesn't want to be put down and be patted. It goes on until he was about 5 months old. He started to get heavier and my arms couldn't take it anymore - the cradling, swaying. So my husband told me to put him in the yao lan (baby hammock) to keep me sane (i cried badly when it was super difficult to put him to sleep). Now he's 7MO and when its time to sleep, he doesn't want to be cradled anymore, he will fuss and push himself as hard as he can away from me and wants to sit upright on my arms. But he's already very sleepy. He will only sleep in the yao lan.. i may have let him be to dependent on the hammock.. any mummies faced this before? How do i avoid him being too dependent on the hammock, how do i train him to fall asleep on his own.. ?