I suggest opening the enclosure and sitting nearby for whatever time you have available. After dinner, I open my snake's enclosure and sit nearby. Sometimes he comes out. Sometimes he doesn't. If he doesn't come out immediately, I turn on the t.v. or read a book watching the enclosure with one eye. If I have something to do that requires both my eyes, I close up and try again tomorrow. That's what I mean by being patient.
And I want to clear. I'm not criticizing you. I chose to use a choice-based handling approach with my snake because I think it's better, but I'm not so confident my approach is better that I would criticize yours. I'm just suggesting another approach for you to consider. I rooting for your success whatever you decide to do.