is your query still current or did you change your mind about coming to good old Germany.
Since you have a German passport, i think it should be fairly easy to get here and find a job in health care.
Not sure whether your qualification is recognised here but you can find it out maybe on following websites Deutsche Botschaft Manila - Informationen für deutsche Staatsangehörige
and to check whether your certificate is recognized, just select your country and click through anabin Homepage
In Germany atm there is a lack of care workers, so job chances are good, but as you know it is not well paid in Germany, if you have to work intially as unqulified carer in old people home you will get around 8 euros per hour.
Also Germany had in last 10 years huge changes in Social and Benefit system, as you are German citizen, you might get unemplyoment benefits but the money is very little about 350euros per month plus rent.
Check here for latest infomation about Work and Benefits Startseite - www.arbeitsagentur.de
Hope it helps:-)