Museumplein is quite far away from Central station, you might need to take GVB , you can refer to here http://www.gvb.nl/english/travellers/maps/Pages/museumsandattractionsmap.aspx
Just notice you can buy a ticket on central station and some place. But you also can pay while you take the GVB, i think the price is slightly expensive and not worth.
Some photo taken near Museumplein , it was a cloudy day and raining -__-''
This is my lunch ^^ , coffee for 2 euro, the bacon around 4-5 euro. That time was raining, i feel so relax while enjoying my hot coffee ^^
There is some souvenir shop around the Museumplein. This remind one of my friend Lilian who like the painting too. "Starry Night" by Vincent van Gogh ( Thanks for wk woo for correction ^^ )
Flower market, other attraction place for people to get a cheap & fresh flower, the street is not too long, just around 15 min, u can walk to the end.