Some good input from the previous posters.
If you are purchasing a machine, whether now or later, be sure you are getting it at a reliable dealer and one that will offer in-shop service. Plus know the machine to the extent that they can support you as you learn.
IF you already have a machine ... just use it for now!
There's no need to go out and buy a new one.
Many use treadles and vintage machines and turn out incredible quilts.
As you sew, you'll discover the features you would like to have when you are ready to upgrade.