Hi and welcome!
I think settings are easy enough to not require a guide.
Start from generic presets - setting 1.01 and switch on FPS counter - 6.02. Then look at FPS in the game, if it's too low, lower the preset, and vice versa. After that you can fine tune settings from section 2. If nothing helps and FPS is still too low, turn on simple shaders - 2.04.
Also, if screen is too blury, it's possible that the game can't detect video memory size properly. Try setting 6.10 in such case.