No_Can2570's journey

I'm currently in a bit of a conundrum regarding my job situation. I have a position that I find quite easy but not enjoyable, and I've been actively applying for new roles. Recently, I received an offer from Company A, which seems like a decent opportunity. However, I've also had several interviews with Company B, who indicated that everything went well but haven't sent an offer yet. I need to respond to Company A by tomorrow, but my preference is definitely to work for Company B. I'm torn between accepting Company A's offer and waiting to see if Company B comes through with an offer. If Company B does extend an offer after I've already agreed to work for Company A, would I just be burning a bridge? I'm looking for any insights or advice on how to navigate this situation.