Fiesta ST3
Illusion is apparently a lovely wax to use, however it isn't very durable. It's purely a show wax.
You will get plenty of applications (20-30, maybe more), you don't need a lot, especially when used with a proper applicator.
There are probably better waxes out there for a first wax. Vics concours, Zymol carbon or one of the Dodo Juice waxes, they'll all offer ease of use + durability which you'll be after.
PB say durability is 2 months + which is not bad for a show/summer wax
then in winter use a hard wearing one like Fusso/FK1000p/476s or others