Spot-Recent's journey

I was laid off a couple of months ago and, needing to get back to work quickly, I accepted a job that wasn't my ideal fit. It was more of a first-come, first-serve situation, and I felt I had to take it to secure income. However, I had already been interviewing for a role at another company that I was much more interested in long term, and I decided to continue that process even after starting my current job. Now, two months later, I've received an offer from that company I actually wanted to work for. The tricky part is that I never disclosed to my current employer that I was interviewing elsewhere, as I didn't want to jeopardize my new position after being laid off. I'm in a bit of a dilemma about how to handle this. Should I inform my current employer before accepting the new offer, or should I wait until everything is finalized and then resign? My instinct is to keep things under wraps until I have the new offer officially in hand. I'm also concerned about whether not mentioning my ongoing interviews could affect me during a background check. Will it show that I was interviewing elsewhere, or will it just reflect my current employment dates? I want to ensure I'm not creating any issues by omitting that information. If everything with the new company checks out, how should I break the news to my current manager? I feel guilty about leaving so soon after just two months, but I took this job as a stopgap after being laid off, and this new opportunity aligns much better with my career goals. I want to leave on good terms and avoid burning any bridges, but I also don’t want to over-explain my situation. If anyone has been in a similar situation — laid off, took a quick job, kept interviewing, and then received a better offer — I would really appreciate your insights, especially from hiring managers and recruiters. Thanks!