One thing that a worker in a public relations position would do is go to special events such as press releases and other day activities. Suppose for some reason that a company decided to close off the entire block around their building and throw a huge carnival that lasted for the entire day. Who would be convincing the city that this was a good idea? You've got it, the public relations worker. Sometimes this could be easy, sometimes it could be hard. It really depends on the PR worker's personality and how agreeable the city is on that given day.
A PR worker will also find themselves doing a lot of writing and editing depending on the industry they're involved with. On top of all that, they will also have the huge responsibility of representing the company that they work for. This doesn't mean promoting the products, because that is what the advertising department is for. Making sure that the company looks good can be a very difficult task, and in order to take a position like this you need to have a very dominant personality. In many cases you'll find yourself actually convincing people that things are correct that clearly are not. This doesn't mean you'll be a liar, but it does mean that you may end up padding the truth quite a bit.
Now for the part that you've been waiting, for which is an explanation of how to get into a career in public relations. There are plenty of job opportunities in the industry, but that doesn't mean that it will be easy to get a job of this nature. In most cases you will need to be a college graduate, but that doesn't mean that you can't get a job in the PR industry while being a college dropout. If you are persistent enough you may find yourself with a job, but in all honesty graduating would probably be the best choice. The reason for this is that employers generally look for people with a college degree and a lot of work experience in jobs such as Junior Account Executive, Account Executive, and even a Senior Account Executive. These are quite important because they'll be related to the job that you are trying to complete for.
No one ever said that the path you've chosen will be easy, but at least now you know how to get into a career in public relations. Hopefully you have found this information to be somewhat useful. Now get out there and give it a try, reach for the sky and grab the career that you've always wanted!