Hi, I've just started learning to any% this game two days ago, and I use nestopia emulator on windows 10. Question 1: Is any version of nestopia fine? Question 2: I use left arrow keys for movement and shift for run. But since L+R is banned, how do I avoid accidentally pressing it? is there some sort of way I can turn it off in the settings?

1. I recommend Nestopia UE for minimal input delay.
2. There is a setting in Input where you can turn off L+R. It should be off already though. Hope this answered your questions!

1. is nestopia UE a valid emulator to run? (sry i'm noob and just started to speedrun the game) and where is the link to download the latest version
2. https://www.speedrun.com/smb1/thread/a3gcu I saw this forum, is this a known glitch with UE, or just something with a keyboard?

yes its fine

Last question: In the input settings where it says "Allow up/down & left/right simultaneously, the box should be un-checked, right?

Yes