You can actually see this in action if you copy a race that does similar, such as the Dwarf (advantage against poison).
On your race, create a Racial Trait (Dwarven Resilience). Fill in the required fields then hit Save. After saving, Edit the trait you just created. If you scroll down, you'll see lots of new fields you can add to the trait. What we want is to add a Modifier.
Modifier Type: Advantage
Modifier Subtype: Saving Throws
Details: Against Poison (or Against Blindness, or whatever you want)
like if I wanted my race to have advantage on saving throws against the blinded condition or soemthing
You can actually see this in action if you copy a race that does similar, such as the Dwarf (advantage against poison).
On your race, create a Racial Trait (Dwarven Resilience). Fill in the required fields then hit Save. After saving, Edit the trait you just created. If you scroll down, you'll see lots of new fields you can add to the trait. What we want is to add a Modifier.
thanks!