Clarification: amendments proposed by a Constitutional convention must only be ratified by 3/4ths of the states. There's no requirement for approval by Congress.
Congress can propose an amendment with 2/3rds of both houses. But, it must also be ratified by 3/4ths of the states.
In either case, I am also skeptical that a large change to the US Constitution would be ratified by 38 states. Only 13 would need to refuse, and I can name nine right away that are almost certain to do so.
How long has the ‘Equal Rights Amendment’ been around? 3/4 of the states is not an easy task.