Vortex Sound Research

I was recently given a DX7 by a family member, sans pedals but all the original carts. I have little to no background in synthesizers. Ive made a few things in VCV rack before but nothing with an interface this unfriendly. I also have pretty much no piano skills whatsoever. I can read sheet music but not play. Where do I begin, both with keyboarding and programming synthesizers?