It sounds like text-to-speech narration is honestly your best bet, for walking-and-writing. I can't imagine much that will help with walking-and-coding because

It sounds like text-to-speech narration is honestly your best bet, for walking-and-writing. I can't imagine much that will help with walking-and-coding because of the concentration required. I'll trip on stuff even without any impediment to my vision. Just my guess!