Most brokers leave the responsibility of reporting and paying taxes up to you. However, most of your trading profits will be taxed as earned income instead of as CGT, which is taxed on investments that you have been holding for a while.
However, I wouldn't worry about taxes at this point as you would have to make a profit first before you can consider paying taxes. However, I cannot give you legal or tax advice given that I am not a licensed professional in your country.
You should consult a tax professional in Ireland to find out exactly how the Irish government classifies the income generated from trading and the taxes levied on the same.