Does Civics 101 need an update?

The situation with the indictment of a sitting President would seem to fall into that “things they did not tell you in school” (even if you were listening) category. That thing that “no one is above the law” that is supposed to make we little people feel better evidently comes with some strings attached and is not as straightforward as it sounds. Evidently, a sitting President can function as an unindicted law breaker for 8 years and maybe 9+ if he/she can elude being charged during a campaign. So, if you were 70+ or so and lacked ethical principles, it might seem reasonable to commit crimes betting your age and the passage of time might make it worth the risk. What were the framers of the Constitution thinking? There must be some level of egregious behavior – say obstruction of the investigation of collusion with a foreign power – that was not considered. Would some constitutional scholar show me where it says this type of thing is OK? So the unwritten procedure (so much of what the law expects to me seems unwritten and established through precedent) must be impeach and then prosecute. Wouldn’t you also have to impeach the VP to prevent a pardon? Which Republican would that put in office? I don’t see a solution here.