Do you understand the necessity of a Senate of the States?
Why do you think the Senate would survive any type of convention that tinkers with the constitution?
Would not the courts mandate that delegates be ‘representative of the people’ according to their respective state?
If the delegates were ‘representative of the people’, would they not quickly forego state boundaries and align with their faction?
If the factions are formed, would states not cease to exist?
If the states cease to exist, why would a Senate be necessary?
The House of Representatives can quickly become a Parliament, and the Speaker of the House becomes de facto Prime Minister.
In other words, repeal the 17th Amendment
https://en.wikipedia.org/wiki/Seventeenth_Amendment_to_the_United_States_Constitution
Prior to that, Senators were appointed by the legislatures of their respective states.