This took me months of practice with Gemma. She absolutely refused to walk with her leash and harness for the first few weeks, and it took two months before she walked normally without stopping and resisting moving forward.
All I did was take her out every day for a short session on her leash and harness. If she stopped, I would not move towards her or backwards. I held my ground and made the point that if she wanted to move, she would have to walk towards me. As soon as she would walk towards me, I praised and praised and praised and told her she was such a good girl. I was praising her with every single step she took and I even still tell her she's a good girl while we're walking and it encourages her to walk faster and be excited. I used to joke that I needed my voice saying "good girl" on a tape recorder playing over and over because I got so tired of saying it, lol, but it really paid off.
Somedays Gemma would not walk at all and that was that. No matter how much I coaxed her to move forward with praise and high pitched cheering or no matter what kind of treats I held out in front of her. She was stubborn and she would not move. It was discouraging but I didn't give up. Finally it just seemed to "click" one day and she realized that walking is actually pretty fun! Now I'm trying to get her used to walking in the cold, which she doesn't like very much. It's like training her all over again, but I think she will get it eventually if I just keep practicing with her everyday.
Also, as a reward for Gemma if she finished her walk, I would let her run around outside behind the apartment building in the grass unleashed. She really loved that. She never gets to go outside without wearing her harness and never gets to run around if she doesn't complete a walk first, so I think she got the idea that if she walked like a good girl on her leash wearing her harness, then she would get to play in the grass afterwards. Once I started doing that after each walk, she seemed to catch on much faster. She was motivated to complete her walk and get to run around and play. She doesn't have access to the outdoors whenever she wants because we live on the second floor of an apartment building, so getting to run freely outside in the grass is quite a reward for her.
Anyhow, I would just keep practicing every single day. I'm sure Noah will get it. They always do with patience and persistence. Good luck!