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.