How to find nearest distance from a coordinate point inside a polygon to the edge (border) of the polygon in Python?

I currently have a dataset with lat and lon coordinates in my first dataframe.

And then I have a shape of a country, Nigeria.

world_filepath = gpd.datasets.get_path('naturalearth_lowres')

world = gpd.read_file(world_filepath)

nigeria = world.loc[world['name'] == 'Nigeria']

pop_est      continent  name    iso_a3  gdp_md_est  geometry

56 200963599.0 | Africa | Nigeria NGA | 448120 | POLYGON ((26958.294 253210.950, 35554.540 4322..

I am not sure how to find the NEAREST distance between the coord points in my first dataframe to the nigeria shape border. I have tried using shapely i think but I keep getting 0 since the coordinates are inside of the polygon.

At the end result, I want to the distance from the coord point to the nearest distance to the boarder of Nigeria for all the rows in the first dataframe.

Thank you :)

Edit -- To include more info and code I saved the first dataset with the point coordinates as 'coord_new'

df=gpd.GeoDataFrame(coord_new,geometry=gpd.points_from_xy(coord_new.longitude, coord_new.latitude))

#df= df.to_crs(26392)

#nigeria = nigeria.to_crs(26392)

df['distance1']=nigeria.exterior.distance(df)

df['distance1']=nigeria.boundaries.distance(df)

This is the way that I saw other people doing to find the distance from point to the border of the polygon. However, I keep getting 0 and then NaN in the distance1 column.

source https://stackoverflow.com/questions/75403236/how-to-find-nearest-distance-from-a-coordinate-point-inside-a-polygon-to-the-edg

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