Hello, newbie here. I have stairs coming off my backyard deck and about 15 feet of grass that leads to my driveway/garage. I have rain coming off my garage roof and landing on the grass making a trench from the rainfall and it gets muddy, especially since thats where my dogs go and come in! Any instructions on how to do a brick walkway, starting with the first base layer. Should I put gravel in between the bricks. Any help would be great! thank you. See attached photo