The normal play is to try and draw trumps. You probably have the entries to dummy to finesse twice (club ruff and king of spades and possibly queen of diamonds), so you start by wondering if you should take a first round finesse, or cash a top one.
Unless LHO has led the 7 from 10987xx, or RHO has played the Jack from J1098xx, clubs are not 6-1. Assuming they lead 5th highest from five, it looks as if clubs are 4-3 and LHO has 1087(x), and RHO J9x(x). So I will try and generate an extra entry to dummy to take two heart finesses. Depending on my opponents, I either lead the DK (if I think they'll take it), or the DJ overtaking with the Queen (if I think they are capable of ducking the DK).
From what you have said about the opponents, it sounds as if I played DJ overtaking by the queen, losing to the ace, and a diamond came back.
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p.s. 3NT is a better spot at mathcpoints or imps
Without interference you reach 4♥... Plan the play. The lead is the 7♣, opponents play 3/5th and UDCA, you play low and RHO plays the Jack.