If you haven't signed any binding contract, you aren't under any legal obligation.
Early on in my career, around a decade ago, I gave a wishy-washy acceptance that I backed out of a couple of days later. I felt bad doing it, but the more I looked at the company, the less I wanted to work there. I still regret the way I handled the situation but don't regret the ultimate decision.
Early on in my career, around a decade ago, I gave a wishy-washy acceptance that I backed out of a couple of days later. I felt bad doing it, but the more I looked at the company, the less I wanted to work there. I still regret the way I handled the situation but don't regret the ultimate decision.