Should I start up directly out of University?

During my Masters I created a very interesting service that would be of interest to many businesses. I proposed this to someone (who I've known for a long time) who does pre-seed investments and he was willing to invest in the potential company if I were to continue to build the MVP out and create a business plan + pitch deck (money for equity). It is worth noticing that I am the sole creator of this service and thus will have to start up alone.

Currently, I am 23 and not sure what to do. Some advice me to take the leap as I do only risk my time while others advice to get some experience at an employer first. With a CS major and only a few courses related to entrepreneurship and books read about the topic I don't know if I am ready to take the leap. My heart tells me otherwise. What would you do?