When I was a 6th former, I won a competition run by my local MEP to get schoolkids of various ages to learn about Europe by doing projects (part of his efforts to raise awareness with all members of his constituency about what the EU is all about). Part of the prize for the older kids' competition was a trip to the European Parliament where I got to shadow my MEP to various debates and meetings and see the range of things they did - it was pretty full-on and really interesting for me as a teenager to see democratic processes at work. For ages after that I wanted to be a simultaneous interpreter (though mainly because they got to sit in those really cool little booths with massive headphones on).
Anyway, if any of us are still not sure, can I just say again that if the referendum goes in favour of 'leave', it'll be extremely hard to get back in again if we change our minds. Whereas if we vote 'remain', we can always decide to leave later. So although JT141 was right to point out the attraction of voting for change rather than the status quo, it really does make more sense not to make potentially irreversible decisions unless we're 100% convinced.