tour amsterdam in november

Dear Experts, good morning

My wife & me plan to visit Amsterdam in this November, my questions are:

1.apart from museums & sightseeings in the city, we would like to arrange some day trips(2-3) to other city like Rotterdam,The Hague,Delft. we wonder if the climate is suitable for travel? is that 3 city in one day workable? or any recommendations to somewhere else? it easy to have tax refund back in Schipol Airport? our plane back to china @1140,we stay @ Doubletree Amsterdam Central, how much time shall we leave for transportation & refunds?

3.any recommendation for The Netherlands brand chocolate & souvenir(easy to carry)? where to buy?

many thanks.