I received a job offer from a company (Fortune 500) a few months ago. Almost 4 months later, I'm starting to dislike it because there isn't much learning for me, and to be honest, it's not the career path I want to take. I feel very demotivated "working" here.
I've already received another job offer from a smaller company and need to join by 25th June. I only need to provide a week notice to this company (no contract or anything) because I'm still on my probation period. The problem is they are sending me abroad for training next week (with another guy, but the training is mainly for me) and have already booked and arranged my ticket/visa. It obviously looks bad if I resign right after my training, even though I would get a certificate for it, would look good on the CV, etc.
I want to resign immediately, before the trip, for this very reason but I am not sure how to approach HR. Should I just tell them to cancel my trip and I will work at the office for a week instead of going abroad? Deferring my other job by like a couple of months isn't really possible.