An amendment needs to be proposed by 2/3 of both houses of congress, or 2/3 of states can call a convention where any amendments can be proposed. Then an amendment needs to get 3/4 of states to ratify.
If I’m reading this right, that is.
So we need 2/3 of both houses of congress and 3/4 of state legislatures to agree. A large hurdle, but doable and necessary for our democracy. We’ve done it before, and now is a time in our history begging for amendments/reform.