As said, and it's the same with SU's, the first fraction of the choke pull out should just open the main butterflies a fraction to increase the revs. After that, it should progressively close the choke plates. Many Weber users just rely on giving the pedal a couple of dabs to squirt a little gas into the manifold before turning the key and that is often enough when the weather is warm. You have plenty of that. Just using the first fraction mentioned to increase the idle a bit for a couple of miles should stop it going below the normal idling speed until the oil warms up a bit. Again, this is the same with SU's. On a warm day, I can just hit the starter button without touching the pedal or choke and it will start if has run that day. It might have an idle which is lumpy and about 100 rpm down and that's where the first fraction of choke comes in handy.
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