Yes you are right.
It can be done by blocking 11β-HSD enzyme.
And licorice root can block it.
But Cortisol can take another pathway.
If 11β-HSD is blocked and 5αR2 is not working, it can brek down to its metabolites by 5βReductase.
Figure 1 from 5α-Reductase inhibitors alter steroid metabolism...