Dave, you're in luck, you came to the right place for the advice you'll need!
1. Working with vinyl requires some tools. Hopefully you also got those along with the cutter. (Simple tools, but essential ---- xacto knife, tape measure, scissors, weeding/picking tool, 12" ruler, masking tape, app tape).
2. Get a cheapo windows laptop (older Dell or HP), and run SignBlazer on it --- Your machine-specific driver is included with this program. http://www.uscuttersupport.com/downloads/Software/SignBlazer/signblazer_setup.exe
3. Working Space -- you'll never have enough! I've found that a 30" x 96" Costco banquet table is nice. Also, an app-tape roller/dispenser is very useful. USCUTTER sells a good one. https://www.uscutter.com/APPRoller-Tape-Application-Roller
4. Remember, when doing car number decals, the slant must be reversed on the other side!