where do I even start with this yard?

I just moved into a lovely home with a very sad back yard. There’s a lot of gravel, and a little bit of native clay soil. I’d like to amend the soil and plant drought-resistant native flowers, and then maybe add some Hugelkultur mounds.

It’s just soooo much gravel, I’m worried that I’ll regret it later if i don’t do something more extreme like removing gravel to somewhere else on the property, or roto-tilling the compacted soil before and/or after getting some soil amendment delivered. I have no idea what I’m doing, but I’m willing to learn if folks can point me in the right direction.

Thanks everyone!