I use Embird too. When I first got Embird it was a basice software. Over time and upgrades, it has a lot more functions than I use. I do have the ability to create new designs on Embird, but I find it does have a steep learning curve. I discovered that I don't have the patience, creativity, or talent to create a totally new design. You can buy the basic program and add on other functions if you want.
Bernina had a very basic software that was free. I don't know if they still have it.