Doe,
I 100% agree with Joe.
"Keep it Simple" is the right approach to calling, IMO. It's the tactic I use when picking calls, rifles, equipment, stands, etc... One can get wrapped up in the complexities and lose focus on the joy of simply calling in a coyote/fox/cat.
I'd suggest getting 1 open reed call and 1 closed reed call, to start. The closed reed is easy to use and user-friendly. Closed reed calls do have their shortcomings when it's gets bitter cold, as well as, a limit on the amount of sounds one can produce. The open reed will give you versatility on sounds and won't freeze when calling in the winter. The open reed does have it shortcomings of a learning curve. But once mastered, it'll be your best friend on stand. You can produce prey sounds, as well as, coyote vocals like Ki-Yi and some limited howling.
I wouldn't invest a bunch of money at this point. Get some handcalling experience under your belt and then add to your arsenal of calls, depending on what you feel is missing, based on your own calling style and experience.
Good luck...
Tony