The idols are not important for completing the game, so you don't need to worry about collecting them all if you don't want to. In regards to being stuck, it is difficult for me to visualise what part of the game you are at. I have attached a video guide that goes through all the rest of the game from when you have the King, onwards. Hopefully it will help you but if you have an issue let me know what bit it is that you're stuck on and I'll do my best to help out:
