Need help with a new walking schedule - I am back in the office 5 days a week

I start a new job and will need to be in the office Monday-Friday, 9am-6pm. I can walk to work; it is about 20 minutes away.

I am getting a little stressed about what to do with my dog. He does not like strangers in apartment so I can't utilize a dog walker. He can hold it for 10 hours but I want to make sure he is comfortable. What walking schedule would you recommend?

I am thinking I will definitely need to walk him twice before I go to work. I am an early riser so I was considering doing the first walk at 6am and then take him out once more around 8am for a quick relief walk before I leave. The problem with the 8am walk is my area is super busy during that time. So many people are walking their dogs, going to work, kids headed for school, etc. An anxious person walking an anxious dog during this time might be a disaster but I don't know what other options I have.

So just looking for other people's suggestions on a walking schedule or any advice you may have. Thanks