The Swordsmith Village Arc in Demon Slayer is really exciting. It focuses on Tanjiro and his friends protecting the swordsmith village. There are new and powerful demons that attack. Tanjiro has to face these threats while also dealing with his own growth as a demon slayer. The arc also shows the importance of the swordsmiths and their unique skills in making the swords that are crucial for the demon slayers.
After the Swordsmith Village Arc, you should start at the chapter that directly follows it. Sometimes, you can check the manga's official website or forums for specific chapter numbers and guidance.
The 'Demon Slayer' story is mainly about Tanjiro Kamado. His family was slaughtered by demons, and his sister Nezuko was turned into a demon. Tanjiro then became a demon slayer to find a way to turn his sister back to human and also to avenge his family. He goes through intense training and battles various demons. Along the way, he meets other demon slayers like Zenitsu and Inosuke. Together, they fight against powerful demons in a world filled with danger and mystery.