There’s no such word as “irregardless.” The word you’re looking for is “regardless.”
Although “try and” may feel like a natural thing to say, “try to” is grammatically correct. We should all try to use proper grammar if we want to sound smart.
Despite the fact that people have been using this word for around 250 years, it’s best reserved for times when you want “to catch attention and to gain emphasis,” according to Merriam Webster. “Although widely disapproved as nonstandard, and more common in the habitual speech of the less educated, ain’t is flourishing,” says the dictionary.