Professional driver training why????

Good evening, I’m doing the training as a professional driver. Because I thought that was a good idea. But I don’t think so anymore. More and more entrepreneurs have told me that they don’t care if their drivers have learned it or not. I have now received an offer from an entrepreneur that I should start with him. He offered me 230€ net in month (distance and dangerous goods) And has super well-kept trucks ́s Am wochende definitely home etc. Me the money is hardly enough to keep up the training. And I am afraid if I continue the training ( 1 whole year still) that I would not get such an offer anymore. And the training does not bring me anything. The ADR certificate would pay me the new boss. What do you think I should go there? Drive straight on the construction (hauffen std. usually around 15 hours on the day) must often sleep in the lkw despite close traffic. Is the training worth it? if so why? how long does one need for the ADR certificate ? many thanks already for your effort greeting Bali