S. R. Faruqi:

The opening-verse is by way of introduction, but it's not entirely devoid of interest. 'The madman is sane/alert about his own affairs' [dīvānah bakār-e ḳhvesh hushyār , a Persian proverb]. More trickery is being taught to him-- 'You are a madman after all, always go around wherever you want, always keep taking a look at whomever you want'.

FWP:

SETS
MOTIFS == MADNESS
NAMES
TERMS

Presumably the trickery lies in the verse's injunction to '[make] yourself a madman' [apne taʾīñ dīvānah], though with no proper verb supplied. The sab meñ could be taken as a comparative part of the injunction ('make yourself more conspicuously mad than everybody else'), or else just as a location ('keep going around in public').

Then there's the sense of chakkar mārnā as 'to take a roundabout road' (see the definition above). An element of conscious choice certainly seems to be present in the advice.

But then, perhaps the advice is only something like a handbook for method acting: 'f you want to be a lover, here's how you both acquire and demonstrate your credentials'.