Man, I bounced off so many Marvel #1s before I figured out a decent path in. The universe feels enormous, but you don't need to know it all. Honestly, skip the really old Silver Age stuff for now unless you're into retro charm; the pacing can be a barrier. For a clean, modern entry point, Jason Aaron's entire 'Thor' run, starting with 'The God Butcher', is self-contained brilliance. It introduces you to a god's epic scale and personal drama without needing a wiki open beside you.
Alternatively, for street-level, 'Hawkeye' by Matt Fraction and David Aja (the 2012 series) is a masterclass in character and style. It's mostly about Clint Barton's messy life between missions, drawn in this iconic, minimalist way. If you like that, it naturally connects to the broader Avengers world later. Just grab a trade paperback of the first volume and see if the vibe clicks.