You need only two Linux partitions, / (root) and /home (home). 14 GBs isn't
much to work with. Fragmentation is not a problem with Linux. Usually. It
can be a problem if you fill disks past 80% of capacity. There aren't any
good defrag tools for Linux because it isn't usually a problem. Most won't
work with ext3 or ext4. Just keep this in mind. Fragmentation will slow you
down and can even crash your system. Been there; done that!

What is unclear from this is if you are moving an existing installation to
have its own home partition or are starting from scratch. If the former,
look here:
www.ubuntugeek.com/...ome-partition-in-ubuntu.html
or www.go2linux.org/how-to-move-home-directory-to-another-partition

If the latter, there is not much help:
https://help.ubuntu.com/community/WindowsDualBoot#Manual%20partitioning
and https://help.ubuntu.com/community/HowtoPartition

Basically you need to know three things when manually partitioning during an
installation. You need to know about devices and partitions (which device,
how many partitions, how big etc.), formatting (ext2, ext3, ext4, Reiser.
etc. and swap) and mount point (it will be / for root and /home for home).
Once your partitions are made then for subsequent installations you can
forget about the first one. On subsequent installations you will choose to
format /, but NOT /home. That way you preserve data and settings. This is
the big advantage of a separate home. A swap partition is optional. too much
is worse than not enough, as disk caching is slower than RAM.

Ask specific questions if you need further help. Many of us have done this
so many times that we forget what the first time was like.