What someone said, it'll take as long as it takes. Don't rush it. But I would have thought you'll be used to it well within the 5 weeks, so long as you practice of course!
And, no, 'clipless moments' are neither a given nor compulsory. At the other end of the scale, some folk never get the hang of it and give in. I figure you'll be somewhere between the two.
Now if you'd said 'clipless and fixed' then I would have said take it easy. That's a combo that does take anticipation and planning, particularly in traffic. Even then, proficiency (and track standing!) come to you with practice!