Hi. Welcome. The car looks like a good starting point.....pretty straight and solid. The interior, as others have said, has an original look. The door panels even have the maroon strip across the bottom, like original. Looking at the wheel covers (maybe 58 Dodge caps), it appears the wheels are 14 inch. These cars in 1946 would have had 16 inch wheels. Then they went in 1948 to a 15 inch rim. 14 inch wheels began with old MoPars in 1957 as I recall. However, you can have whatever you like on one of these older vehicles....that's the beauty of it. Suit yourself. I have added some period accessory items to mine, while maintaining a generally original look on the exterior......and use 55 Chrysler wheels.
Have seat covers on the seats for now and made my own door panels, so they are not quite original. Eventually will have the seats and panels re-done closer to factory.
So, enjoy your car and purchase a couple books - a repair manual and a parts manual. They are often listed on ebay in the 1946-47-48 Plymouth section. There are originals, reprints and some on CD. Very helpful for many things.