New to roasting: which selection of beans to start with?

Just picked up a used Behmor 1600 that I'm unbelievably excited for. The gentleman provided me a small bag of Ethiopian beans.

Looking at Sweet Marias, I need some help putting an order together for green beans. What selection of beans should I purchase so I can learn about coffee roasting and experience a wide variety of different flavor profiles?

I personally enjoy Guatemalan full city roasts with plenty of body. Open to trying everything though to expand my pallet, with little interest for French roasts though.

Thank you!