Reddit mentions of Retro-Bit Tribute 64 Wired N64 Controller for Nintendo 64 - Original Port - (Red)

People frown upon emulators since there is a tiny difference, but if you don’t have the money, use an emulator. If you have some to spare, buy an n64. Although I would start with the emulator because save states will be very helpful when starting out.

Edit: I would recommend a controller kinda like this, just, if you use an actual n64 controller, don’t use an original because the stick wears down over time. Buy a slightly modified one from amazon.

 Retro-Bit Tribute 64 Wired N64 Controller for Nintendo 64 - Original Port - (Red) https://www.amazon.com/dp/B07Q78YN2T/ref=cm_sw_r_cp_apa_i_nDInDb747MR6Y

If it makes things easier, the Brawler64 by RetroFighters is a modern take on the N64 controller. Imo the plastic molding on the controller feels a little cheap - as well as the joystick, and it’s not going to be the best controller for shooters due to the sensitivity. But it’s still one of the best options out there for the N64. I actually have five of these controllers (one of each funtastic cooored variant they have released)

The Tribute 64 is another great option. It has more of a retro feel, almost like an N64 controller meets the GameCube controller.

I included Amazon links, but if you decide to purchase them then also consider ordering through their official websites or Castlemania games as well to support the small businesses :)

You can check either the Brawler 64 or the Tribute 64. They the best “modern” alternatives for N64 controllers imo.

If you prefer using your GameCuber controller there’s a ton of adapters around. Personally I would not recommend them since depending on the game you’re going to be spending a lot of time reconfiguring buttons. The layout doesn’t translate well between the two.

If you like the original form factor of the N64 controller there’re stick replacements on Amazon. Reviews are all over the place for those, some people like them, others not so much. But they’re cheap so maybe its worth a try.

Now as a fan of the original N64 joystick I am also obligated to mention Steel sticks 64 who sell parts that you can use to turn your broken N64 stick into an stainless steel behemoth. Several speed runners that are used to the original design use these because if properly maintained (aka: add a little bit of lubricant every once in a while) they’re pretty much indestructible and will last forever.