First of all, you're new to this, and the less you have to monkey around with something as a newbie, the better. Better to play what you have and get to know it, get comfortable handling it, etc. before swapping and aligning and all that.
Second, and I think this is worthwhile: Marantz is on the badge, but this is a Clearaudio package. They designed and made the turntable, and of all their cartridges, selected their Ebony Virtuoso. Under these circumstances, you can be pretty sure that this cart is an ideal match for that turntable and tonearm in terms of weight, compliance, and resonance control, and it probably comes with a better factory alignment than you could do yourself, esp. if these things are new to you.
I'd enjoy the heck out of that package, and when you've had it awhile and maybe you're due for a stylus retip or a new cartridge, look into your options.
See if you can find any info on the quality of your AVR's phono stage. Who knows, maybe it's pretty good. But chances are you'll get more sound for your dollar sticking with this Ebony Virtuoso and upgrading the phono stage.