The game .ini files are the way you're supposed to manage settings for individual games now. Only a few options in these files can actually be set from within Dolphin's GUI, so you will have to edit the .ini files manually with something like Notepad. We have a thread describing most of these options you can set here: https://forums.dolphin-emu.org/Thread-unofficial-howto-using-gameini-settings-per-game
If you are having trouble getting certain settings to work (e.g. how do I set the Internal Resolution or Anti-Aliasing?) feel free to ask about it and we will try to answer as best as we can.
Also, your English is pretty good, don't worry about that. I wonder why those with near-perfect English are always the ones apologizing, while those with terrible English never do... :p
If you are having trouble getting certain settings to work (e.g. how do I set the Internal Resolution or Anti-Aliasing?) feel free to ask about it and we will try to answer as best as we can.
Also, your English is pretty good, don't worry about that. I wonder why those with near-perfect English are always the ones apologizing, while those with terrible English never do... :p