The park is specially nice on summer, but it also becomes interesting in autumn, full of coloured leaves:
And in winter too!
You can get there by U4 Rathaus Schöneberg, but U7 Bayerischer Platz is also nearby (5 minutes).
From the ring (Innsbrucker Platz) you just have to walk 5 minutes.
If you are into asian food, I recommend you to eat at Viet Rice where they have fantastic dishes for 5 euros. The eastern area up to Eisenacher strasse is also full of nice coffee places.