Translation's fine, didn't find any awkward grammar, the actual chapter itself is bad though, but it's the author's fault..
... Coming back to the past and he said he wanted to prepare thoroughly, but the first thing he do is literally skipping the time until he's an adult? What? Am I missing something or he's dumb? It's an amazing plot armor he finds out later that during the time he skipped it seems the system doing the work for him, what if it's not? What if after the skip turns out he's doing nothing and got into major disadvantage? Apparently he didn't even know how much time he will skip before deciding to randomly skipping time... He stated that he's coming back FOR his parents, but he choose to skip interacting with them because he finds it a hassle lol, what an ungrateful kid. He should've skipped straight to the final chapter so he won't have to do the heavy work since the system will taking care of him with godly autopilot.