Your Quirk has Awakened, meaning it has undergone an evolution that raised it to a new level of strength and uncovered new aspects that can be developed. Training Quirks that have been through an Awakening is much easier than training Quirks that haven’t undergone an Awakening, as Awakened Quirks have their restrictions loosened and are incredibly malleable, allowing them to respond better to attempts to improve it.
Your Second Quirk has undergone an Awakening alongside your first Quirk. Both of your Quirks will synergize no matter what they are. They will have additional aspects that you can develop through using both of your Quirks in harmony. Your Quirks will slowly grow to cover the weaknesses of each other.