I think the poles are going to be your best option at this time. I'm not sure your jumping experience, but it seems to me like you are learning together.
In that case, I would recommend staying in a 2 point, using poles to regulate his speed, until you and him learn more, then worry about going into a 2 point at the right time, his leads, and actually riding to the base of the jump.
Right now, in the first steps of learning to jump for you and the horse, there's no sense in trying to sit at the approach, then 2 point. You could so easily hurt his back or his mouth doing that. I think in staying in a 2 point you will have to find better balance, you won't hurt him, and it's not wrong at all with a pole before and a pole after the fence to keep him trotting it.
This will help him feel what it's supposed to feel like. I don't agree with advising you to try and ride like a pro show jumper, eventer, or a jocky, unless that's what you are trying to do? Of course, watching videos isn't bad but those people are not at the level you and your horse are at so things that they are employing in your riding wouldn't be practical when learning to jump imo.