Design an SMPS to provide 5V – Transformer
Maybe I'm horrible wrong with all this, but I'm open to all
  suggestions and advices I can possible get.


I would look no further than Premier Magnetics - they support a large number of Power Integrations designs such as this universal one that uses the TNY-255: -



This page will take you to various options for off-line SMPS designs and if you click on UL-CSA Recognized - TinySwitch Transformers it will deliver the TNY options.