For paths, your town can be split into four main sections: Below the town hall, below the vertical bridge, below the river, and below the plaza. For each of these areas, I drew 2 different paths, each shown in a different map:
Map 1 and
Map 2. (On the second map, the house can be connected to the above path to the left or to the right; I forgot to use my
awesome drawing skills to add those lines in) While I only drew two maps to show all the paths, you could mix and match as you see fit, leading to 16 main possibilities.
Black lines are the main paths,
red lines are side paths,
pink circles are places for gardens or parks, and
purple circles are areas for large PWPs such as the police station or windmill. I also higly suggest putting a lighthouse where 'Lighthouse' is written, and a path and bridge where the yellow line is.