The door opens even wider. You do not have to be a scholar. You do not have to master every shloka. If you simply listen to the Gita with faith in your heart and without resentment or fault-finding — that alone is enough. You too will be freed. You too will reach the auspicious realms that the virtuous attain.
Two qualities are asked for: shraddha (faith) and the absence of asooya (resentment). Faith is the willingness to receive. The absence of resentment is the willingness to receive without arguing, without looking for flaws, without approaching the teaching as something to defeat.
This is the Gita's widest invitation. Not everyone can study deeply. Not everyone can teach. But everyone can listen. And if that listening carries sincerity, it does not go to waste.