Are you planning to make your own designs or purchasing already made designs from somewhere? Does your machine have a USB or do you need to tranfer the designs to your machine via card?
I have an embroidery machine with a USB and only used purchased or free designs. I have not had to purchase any additional software such as Embird, BuzzTools, PE Design, etc... Because I have the USB I don't need a converter box to move designs from my computer to a card...