Understanding Hadith Classifications: Sahih, Hasan, and Da'if

Assalamu Alaikum, brothers and sisters. I'm trying to learn more about our deen and have a genuine question about hadith classifications. I want to make sure I'm following Islam properly without falling into mistakes. I get mixed up between sahih, hasan, and da'if hadith. Can someone clarify for me? 1. If a hadith chain (isnad) is labeled hasan, but overall scholars say the hadith is sahih, should we treat it like any other sahih hadith with full confidence? 2. Generally, can we rely on hasan hadith for acts of worship and fiqh rulings? Is it considered solid evidence? For example, if there's a hadith about a particular step in salah that isn’t in Sahih al-Bukhari or Sahih Muslim but is graded hasan and suggests that step is obligatory, should we act on it based on that hadith? 3. What’s the deal with da'if hadith? Are they ever okay to follow? If yes, when and how, and do scholars differ on this? I'm hoping for answers rooted in the approach of recognized hadith scholars and the Quran and Sunnah, with references if you can. Jazakum Allahu khayran.