The internet can be a great place to get information, but you have to be very careful. The problem that you are going to face is that there is a lot of bad information floating around online. This does not mean that you can't trust what you read but it does mean that you have to be careful. It is best not to put too much faith in what any one person tells you.
The big reason that you have to be careful about the advice that you get on the internet is that you really have no idea who is giving you the advice. People can claim to be anybody they want online and this allows them to present themselves as experts even when they are not. The first danger that you are going to run into is that the person giving the advice simply may be wrong. The internet is full of information that was put there by somebody who thought it was accurate when in fact it wasn't. The very nature of the internet means that this information can spread very quickly.
An even worse problem online is that somebody intentionally put bad information online for their own purposes. The main reason for this is to make money. Internet marketers have found all sorts of clever ways to make money and one of the things that they will do is to offer advice that is not accurate in order to sell a product. This is a fairly common practice so you have to make sure that you take everything that you read online with a grain of salt.
There are also people who will put up false information just for the sake of screwing with people. This is largely because of the fact that the internet allows them to be anonymous. They do it for all sorts of reasons but usually it just comes down to the fact that they think it is funny to mess with people. This bad advice is usually pretty easy to spot but you do still have to be careful.
Since you really have no idea if the advice that you are getting online is of any real use you have to make sure that you verify everything, at least everything that is important. Do not make any major decisions just because somebody online told to do something. Rather you are going to want to make sure that you do your own research. You can use the internet for this but you are going to want to make sure that you check with multiple sources in order to verify what you have read. Even this may not be enough in some cases; some bad advice gets repeated over and over again. Therefore if you are at all in doubt do some research offline.