Well Vorcera, I am in Holland too, so that might help a little.
Two things.
1) DJ-ing is not about skills. I believe that you think those are good enough after 2 years practicing (a lot I hope) and they probably are. You are most likely NOT ready for a club yet. Why? Because DJ-ing is about knowing what track must come next, not about how well you beatmatch, how skilled you are with filters and FX or even if you can scratch or not. To get that skill your friends are right, you have to get out and play in front of people. A paid gig at a club (even if someone would offer it to you at this stage in your career) is not the best place to start learning that. The audience is (predominantly) strangers who can be very unforgiven, if you get paid the room for error is considerably less and if you do mess up a bit (from nerves, from not knowing what must come next or for whatever other reason), it can ruin a reputation before you get around to actually acquiring one. Best to start playing house parties, friends birthdays and BBQ events. Not saying forever, or even for years. But enough to get a feeling for what it is to guide an audience and react to what works and what not when playing out.
2) If you start DJ-ing now, it might be a while before the extra income becomes a tax issue. It also depends if/how you get paid. You can incorporate yourself and become a one-man enterprise (eenmanszaak). This means you are now registered at the chamber of commerce and you can send invoices. You can also deduct all your expenses (gear, music, courses, books, travel, etc.). Which means if you make less than your expenses none of your extra earnings go to tax, you can deduct the VAT (21%) of everything you buy. If you start making more, you only have to pay income tax over the income that is left after paying all your expenses.
Hope that helps some.
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