Should I take the investment?

Im 23, I have been looking for investments for the better part of 2024. Finally an angel investor is interested in our startup. But doubts are creeping in. Should I take the investment? What if it doesn't work? I know that as a founder you won't be able to take a huge salary but my family is in a tough financial situation. I also have a job opportunity at big4( started job hunting for the past 2 weeks cause I didn't see any progress ) , The 9-5 would be so helpful for my financial condition right now. One possibility is I could invest some part of my salary into the startup as well but that would be slow. For context, I would need at least 14 clients just to breakeven with the job offer I have in hand. So to have a decent revenue I would need to have 50+ clients working with startup. It's a B2B model. What should I do? Should I take the investment? Run this in parallel with my 9-5? Edit: I don't think getting 50 clients is hard. It was just to give a perspective on what a decent client size would be to consider it early success.