If you're having trouble getting into this, then play The Legend of Zelda Redux. It's a patch that improves the map, subtly clues you in on which walls can be bombed and which bushes can be burned, and fixes the original garbled translation which butchered many of the original hints. All of these make this game much more accessible, but still challenging. It also includes a bunch of small graphical changes, but many of these can be reverted if you want a more vanilla-feeling experience.

Whether or not you're playing the game with that hack, be sure to check the manual that came with the original game, featuring lots of valuable info, here:
https://www.nintendo.co.jp/clv/manuals/en/pdf/CLV-P-NAANE.pdf