Check your Constitution.Impeachment is followed by a "trial" in the Senate.Impeachment requires a simple majority in the House."Conviction" in the Senate requires either a two-thirds or three-quarters (can't recall which) vote by the Senate.
Unless health issues arise DJT will be President at least until January of 2021 regardless of what happens in November.
Personal opinion; if the Democrats somehow got 300 seats in the House and any gains in the Senate, I suspect that you would not hear the word impeachment for the next 2 years. They can’t all be as STUPID as Maxine Waters. The brighter ones have to know that impeachment and conviction due to the simple fact he stopped the coronation of the chosen queen will ignite the fires and it will be flash fires and all of them just might get burned.
Again, just a personal opinion.