Yes, that is correct.

Jokes aside, there was a link elsewhere that described the process. There's a convention, and there are elected delegates sent there (can't recall if it's elected by the legislature or the people), to review the constitution and amend it, but any amendments have to pass with a 3/5 majority and then get ratified by popular vote.

And honestly, the last time we amended our constitution (with at least one free stater amendment, to boot...) both amendments were ratified with an 80%+ popular vote.