I've been diving for a long time, but I still can't help but say: don't be scared by terms like data availability, ordering, finality—just focus on one main thread—whether your transaction has been "written in" or not, and whether "others can verify it." To put it simply, if everyone can access the data = others can audit; who comes first or second in the order = whether someone can jump the queue and mess with your mindset; finality means whether you think it's stable or if it might flip again. Recently, hardware wallets are out of stock, and a bunch of phishing links are flying everywhere... I really think the priority is to secure the entry point first: layered permissions, multi-signature/hardware isolation if possible, not dreaming of getting rich quick, at least don't lose your coins and have your dreams shattered too fast.