How to help my stepson when he’s completely freezes when out of his comfort zone?

Apart from a lot of patience which I know, what are some tips to helping out my step son when he completely shuts down when taken out of his comfort zone?

I’ve been trying to teach this boy how to ride a bike since he was like seven/eight years old but he has two left feet, his coordination skills just aren’t great and he’s been like that since he came into my life when he was five. On and off I’ve been trying to teach him, we take breaks when we’ve run thru it a few times and have taken an extended break (three years) because one he out grew his bike (he’s a big kid 5ft 6in and only 11.) nGot him a new to us bike that’s one size before an adult bike and well we’re back at it. I’ve worked with him with all I can work with I feel like. W

hen he was younger he had training wheels in the smaller bike that he outgrew quick my neighbor gave us like one of those bmx bikes that I tried installing training wheels on but didn’t work so we resorted to trying to balance by taking off the pedals and pushing with his legs like a balance bike and that’s where we’re at now with his current bike. He complained about the seat so I got him a comfy beach cruiser seat, said the pedals were too small swapped for bigger pedals, I’ve done just about everything that I can think of to make him feel comfortable and well we’re still at the same spot trying to push and balance. He completely freezes, doesn’t move and stands there looking at me with this blank look on his face. We just can’t make progress.

Why does he have to learn to ride a bike you may ask? I just feel like it’s something we all learn and would be good for his confidence. I don’t push the issue too much the last bike session we had was like a month ago. All I’m trying to say is how do you help your kid when they just freeze and don’t make the attempt? And I’m not even talking just about bike riding but in general life situations he’s only getting older.