I let the excited designers lead.
Not a mandate, at first: the tools were too early for design. The three or four already experimenting each took a different area, then showed the rest.
I made the learning weekly.
Show-and-tells where someone always showed what they were trying.
I gave the slower starters a peer, not pressure.
Gentler on-ramps, a peer as a coach, and a weekly check-in.
I held the bar on taste.
In 1:1s: "Is your taste in this, or did you just let the agent do it?" [critique practice: what you set up] And I chose not to police every engineering ticket, so I didn't burn out my designers.