Looking for input on conversion of flex room to walk in coat closet/mudroom

We have this really tiny nook (roundly 6'x6') situated off the front hall that we want to remove the floating desk and cabinets from and turn into a mudroom/walk in coat closet shared for the front and garage doors.

Based on the dimensions, what fixings should I add? I think a couple low shelves for kids sports stuff and other storage, closet fixtures along the back, not sure if there’s room for an island, so maybe a small side table.

Also is it overkill to do this while still having a normal closet at both doors and a bench/hook fixture in the garage entrance?