Hello! I’ve read this a while ago and forgot the name of it. Details are pretty blurry but I think he regressed/reincarnated back into a baby and has a dream of being famous/idol? MC can go into this library and look at his system window and can get skills? I think some of the things that I read was he helped this new kpop group and filmed a “return to Superman” (Korean variety show)-esque show where the idol group takes care of him for a while, while the parents are away. I think another thing the MC did was star in a YouTube advertisement and he used a skill to make the other babies also eat their food like him. I think in the recent chapters he moves to America and there’s a time skip, so he’s an elementary schooler now and becomes a child actor?

For those that were interested, I found it it’s called Superstar from age 0.