I can’t get the megaton hammer

I am playing ocarina of time on project 64. I’m running it on my PC.

I don’t know if it’s my setup, or what, but I cannot for the love of Pete’s dragon make it to the chest in time.

I hit the switch and then go to get on the stairs that lead up to the chest and I over jump, fall off the side down the big hole. I can’t go over the broader side because of the stupid flaming Keese, and it takes too long.

I can share my control setup. I also heard that if I get the longshot I should be able to reach the chest as well using it, but I got that from perplexity so I’m not sure.

any tips?