1. It doesn’t mean that you can give someone else the gift.  Only the Holy Spirit does that.
2. It doesn’t mean you need to be trained to use the gift.  Gifts, by definition, are ready to use.
3. It doesn’t mean the gift of prophecy would involve telling the future.  The context of 1 Corinthians 14 is that the prophecies are immediately assessed by the church body.   Even if they did involve the future, they wouldn’t necessarily always have good news.
4. It doesn’t mean that you’d get vague messages from the Holy Spirit about possibly “living on the East coast” or that you “had financial problems” in the past.  Those are about as meaningful as “prophesying” that someone is a carbon-based life form.  Those are Psychic 101 tricks.
5. It doesn’t mean that non-believers would have the gifts.
6. It definitely doesn’t mean that you’d give affirming “God is proud of you / no need to change anything / don’t believe anyone who tells you otherwise” type prophesies to non-believers (that literally happened to a self-identified unrepentant, polyamorous, pagan witch).

The Continuationists I’ve come across get most or all of those wrong.

Once again, you should start with the gift of discernment.  If you don’t have it, ask God for wisdom and He’ll grant it.