u/El_Maestro10

We live in Dallas, TX and my wife wants a cacti flower bed in our front lawn. Our soil is hard black clay. What should I use to help prepare a section of ghat soil?

I have bags on compost and we have piles of oak mulch from a tree. Should I just mix that in with the clay for nutrients and help make the clay more spacious? Should I go by some Concrete Sand to add with the clay, compost and mulch to make it course as well? How should I tackle this