Student or Learner
What will be the correct article before an "i " that is pronounced as "aai" as in icy? Will the rule for "U" apply here?
It's not the same rule.
The "aai" sound is a vowel sound.
Whether it's an i like "indigo" or an i like "icy" it's still a vowel sound, so use "an."
With u, the u in umbrella is a vowel sound, but the u in universe is a consonant.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.