As Rob1n suggested, df -h in terminal shows you the memory distribution across different partitions.
System or "rootfs" partition is only 227.9 Mb as it sits on a different memory chip. 58 Mb available on rootfs is actually not bad. It should be enough for all operations, except perhaps for a main system upgrade. See this thread for discussion on rootfs: http://talk.maemo.org/showthread.php?t=33362
Your 32 Gb memory is allocated under /dev/mmcblk0p1, which is linked to /home/user/MyDocs. By default it's a fat32 partition available for all your documents, photos, videos, etc. It should not affect your system memory.
Another partition, which you should watch is 2Gb /dev/mmcblk0p2, linked to /home. As all applications from Extras are by default being installed in /home/opt, this 2 Gb may be eaten pretty quickly if you install too many of them. If this partition is full, I'd suggest to uninstall some rarely used applications.