There are plenty of sources of personal financial information in the modern world, but not all of them should be given equal weight. After all, is it really advisable to trust something that your uncle told you as much as something that a professional tells you? Of course not, and you must always keep these legitimacy questions in mind.
There are paid professionals who work exclusively to inform others about what they need to know about mortgages. These professionals are great for being able to answer any questions that you might have about anything to do with your mortgage. The problem with them is that they are paid for the services that they provide. It is unlikely that you have a ton of money lying around to pay them if you don't have to. Thus, most of the time you are going to want to skip over the real professional for some cheaper advice.
A strong source for advice on mortgages is the general public on the internet. They obviously will not be providing you as much verified information as a professional would, but it is not a bad place to start. Just keep in mind that these internet posters know nothing of your personal situation, so the advice that they offer may be very broad and may not even apply to you at all. As long as you are able to keep this in your mind, you will be in good shape to start to move forward.
Always double check any information you get from a non professional source. There is no telling what facts are true or not until you verify with other sources. Once you have done all of this, then you are ready to move forward and act on the information you have been presented. Best of luck to you getting your personal financial situation completely in order.