Online tutors/simulators for dcs -yokogawa-cs, analysers, plc

Hey naijahotjobbers, i need websites/links on where to gain little practicle knowledge on any of the digital control systems used in the I&C industry
Since i am a recent Electr/elec graduate without any on the job knowledge in Instrumentation and Control, i was hoping someone will be kind enough to give me links on how to go about downloading applications or simulators whereby i get to teach myself.
I have been waiting on all these Oil and gas companies to employ and train me but i am done waiting
I want to take the bull by the horn now
Waiting for your urgent response Sammie, donivald, tripple C and other engineers with infos
Thanks