I've had the pe 770 for 5 yr., and have made many labels using it. I don't use software, but l do import designs using usb from my laptop. Experiment with your built-in alphabets, note how L M & S sizes look. You can position one line of lettering in the hoop. I use an air erase marker to draw lines on fabric in hoop. You can then program one line at a time, moving the position with the arrows so you don't need to rehoop. At first, l tried doing the lettering with a frame l'd already stitched, but after a couple of tries, found it better to do lettering first. Watch you leave enough room for some sort of frame, though. Again, frames can also be reduced/ enlarged somewhat...my problem was learning to leave enough space within hoop...you can't embroider to very edges!
Sometimes l don't " complete" a frame...l stop machine before it does, then go to the 'built in designs and choose one as a partial ' wall' to frame.
You need to play around to try a variety various designs...l choose a " flower sprig " sometimes, ie: something skinny. You can orient vertically or horizontally! Sometimes l use a usb and import a design l've saved to my computor . Therecare free designs available on some embroidery sites or join a " free embroidery designs" group on fb. I found it helpful to join a fb group for beginners' help. Most important, keep at it! When l first started using this machine, l'd do one item, then let the machine sit for weeks...next time, l had to learn everything all over again! So keep practicing...push buttons and arrows, and learn what does what...l promise, it won't blow up!