The designer 1 was made just before USB sticks became the rule. You CAN have it updated to USB, but it is pricey.
Get an external floppy drive for your computer and a couple of boxes of disks.
the D 1 uses SHV, HUS, VIP3.
when you buy designs online they ask which one you need. Also, a good dealer will have design collections available that have all the the "languages" on them. Check out all the software options out there, talk with the dealer, and get the one you can and will be able to use.
Check with your nearest Husqvarna dealer for information about embroidery classes.
Good Luck!