Hi,
I was once in the same situation as you! Qualified, but a bit dissatisfied with the IT industry until I found SAP. It's a hard area to break into, but well worth the effort. It's interesting, challenging and rewarding.
I recommend that you get yourself some real SAP training. It's expensive but well worth it when you score that first position. Then try to get a job - any job - with a large company that uses SAP. Then work your way into the SAP department.
Knowing a functional module is useful but not required. As a SAP technical person you are expected to handle any module they may throw at you.
Forget about certification for now, that won't help. Experience is the golden prize.
good luck
Paul