I was going to install it in vmware, if thats possiable
I have FreeBSD and Solaris running in VMWare, so its possible.
is it even worth looking at? would it benefit me in the security field knowing this OS?
Yes it
is worth looking.
Can it be customized the way linux can?
Yes it can be customized as linux and if you are very with linux it will be very easy to find your way around in FreeBSD.