Mac Designer to IT Professional

I am a Mac graphic designerwith 6
years of experence. I am the system
person also. I keep the computers
going and show everyone how to use
the programs. Also when things go
down I get them going again. I have
found my self more interested in the
programs and computer than the
design.I would like to become an IT
Professional. How should I go about
getting there? Should I go get a
certification or should I look for a job
to get experence? Will I be able to
make an about 40k a year right
away?