Hi Wee Kean,
The easier way to explain is you go down to the Lower ground exit of the Belcher's (next to the Westwood), walk straight down to the tram line, then turn left and walk to the next block, the park is right on the opposite side of the road, you can't miss it!!
Once you find it, you know there are different ways to get there. It's very easy to find.
Cheers,
Cyndi