Hiya,
It's pretty daunting going onto investment forums and not knowing any of the jargon, but don't worry you pick it up pretty quickly. My best advice is to read, read and read some more. There are literally hundreds of books out there which help you understand the stock market. A tiny fraction of them I've read.
I started with
this book which gave me a fantastic understanding of not only shares but other forms of investments e.g bonds, options etc. It is a little pricey and pretty hefty but the knowledge is invaluable and you'll have a clear understanding of all the jargon. Plus it has lots of lists of really useful websites to use for research and a glossary at the back which I've found useful when searching investor forums.
Next I read
this book which was fantastic. The book is filled with great tips and is very humorous in places. The first book gives you a sound understanding in how stocks and shares work and this book then goes onto give you techniques on how to pick winning stocks (or in some cases losers, which you can make money from, which you will learn later.) So yeah this is a great book for strategies on picking medium to long term stock for your portfolio.
Another book I'd recommend is
this one. There's a lot of talk these days about the psychology behind investing and the markets so I thought it would be an idea to get to grips and have a better understanding on it. This book didn't let me down, it's quite heavy on the research that has been carried out, but it has lots of information on how people think and behave when investing. This can be valuable information as if you know how people are likely to behave you can make more educated decisions on where and more importantly
when to invest.
Those are a few of the books I've read which have really helped. Although I haven't read it yet, the Intelligent Investor is supposed to be every investors bible so that's on my list to read soon.
Go onto youtube and watch videos on Warren Buffet, take down notes on what he did and any advice which you think you could use. Another great resource which I've used is
http://www.khanacademy.org/. This site has loads of videos on finance and investing which I've found really helpful and interesting. Mr. Khan is very good at explaining things clearly and concisely and all the videos are free!
So that would be my advice to start off with. I've learnt a hell of a lot since I started reading in January and now I can go onto any investment forum and understand the jargon so it's very much achievable you just have to want it enough. Best of luck, hope this post helps