Sorry for that, to start your own payment service provider business is requiring a lot, starting from PCI certification (Level 1) to establish a whole organization including real office, staff and a lot of experience in this business, the most important is to have plenty of capital available (EURO 100k +) there are various information available on the Internet which you may read and learn from before you go further.
Let it be said, it is not easy to get started and without lots of capital you should not at all consider this.