I believe in shares and that you are never too young to start learning so I will add some thoughts.
"Paper trading" is only useful for testing trading systems but "getting a feel" for shares is like riding a bike: Have a go and if you fall off have another go.
Most battles will be in your mind that is it is not as easy to dump bad trades and let the winners run as it sounds. Little voices in your head are telling you different things. Besides,
THERE ARE NO RULES WHICH WORK ALL THE TIME!
Open an on-line account (Comsec or eTrade) with your Mother as trustee (?) because you will not feel like handling small trades through a full-service broker, he/she may not want to do them and the brokerage will kill you anyway.
Being young and impatient (that's OK by me
) you will not want to go with blue chips, that's like watching paint dry so you will look for small companies which may become big ones. Junior resource companies have that attraction but also have a high failure rate. You will try some before too long but be careful. We [Australia] also have two companies who have made break-throughs in alternative energy that they are trying to get into full production. If they succeed they will show big gains in a few years. Still unproven, thus cheaper still, are our "hot rocks" electricity generators. The real-estate trusts may be ready for a rebound and in a year or so the banks may have their day in the sun. There are plenty of good ideas and it can be fun testing yourself provided you don't take things too much to heart.
Buy a stock and watch it. If/when it looks a good move and you have saved a bit more, try another. If it does poorly sell it and try again. After a few years of this you still wont have a valuable portfolio but you will have had some valuable experiences and if you study your emotions you will be in a position to make the best of your high income years, hopefully avoiding expensive, silly, mistakes then.
If you become even half good at it, it can a lot of fun. You will never buy lotto tickets or play the pokies either. At least I don't.