Disclosure, I'm a D-Wave employee; we're one of the hardware vendors. Here's a handful of resources: an introduction to our software stack [1], the SDK [2], a repository of demos [3]; a webinar [4]; and if you're willing to sign up for a free minute of QPU time (using our cloud service directly rather than AWS), there's some live demos and interactive Jupyter notebooks on the Leap service [5].

[1] https://docs.ocean.dwavesys.com/en/latest/getting_started.ht...

[2] https://github.com/dwavesystems/dwave-ocean-sdk

[3] https://github.com/dwavesystems/demos

[4] https://dwavesys.zoom.us/webinar/register/WN_WRHBYy1eQB-20oT...

[5] https://cloud.dwavesys.com/