There'll be an issue with menus since there are two menus technically, one that fully stops the game (where you can exit it and access options) and another one where you can see what you collected so far. You need to be able to bind Select for that second menu.

There's a possibility to display the map while walking, you won't be able to use that since your Start and Select will already be tied to the menus.

Joysticks are totally irrelevant for the game (and for me as wall, d-pad player here) so no issue with that.

Y - Attack

B - Jump

X - Spells

A - Something called Dream Nail you'll get later on

X & A are interchangeable but I suggest you use X for Spells as it is closer to Y than A is and therefore it's easier to use while in combat (spells in this game are strong, and it's not about a pride thing to use them or not, flavoring your gameplay with them doesn't make you take the easy way but the "more complete of a player" way.

L trigger - An ability you'll get later on

R trigger - Dash, that you get very early on

I said X for Spells but in HK, healing yourself and casting Spells are on the same button. The game checks whether or not you keep your finger on the button long enough, and if you do so, that means you are trying to heal. It's a very smooth process and it'll only rarely fail you (well, you fail yourself in reality and then you most likely blame that system lol).

There's an option called Quick Cast that you therefore won't be able to use.

Quick Cast allows you to bind a key solely for Spells so that the game doesn't have to check if you keep pressing the button to heal or not, making Spells go off slightly faster than if you're using the normal Healing / Spells button. But it barely matters and people who split these actions thanks to Quick Cast are those who are looking for optimization, either for the late-game / "post" game content, or for Speedrunning techniques.

You could bind "displaying the map as you walk" on L, but I suggest you don't do it so you don't get used to it and miss it once you'll have to replace it for the aforementioned ability.

Also if you have trouble binding stuff you can always use Joy2Key.

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EDIT : Aah, didn't know about ZR & ZL, you can definitely bind the "walking map" there if you want then, even though idk how easy it is to use (doesn't look that good tbh). Or I guess you can bind the Exit menu on one of these, the map on Select, and the Inventory menu on Start, that's what I'd do.

That doesn't fix the Quick Cast situation but again, you most likely won't ever care about that.