Let me tell you that you can completely trust Bob and Tyler. They really know their stuff. There are many others who can give you help for specific issues.
On nursing your toddler: I nursed all seven of mine till they were around 20 months. You can safely wean your little boy now if you want to. The IP won't hurt him, but it won't scar your little guy for life if you train him to figure out how to go to sleep on his own now. This is not the right forum to discuss how to wean a baby, but I bet we can find one if you want ideas. :-D