I didn't know that Ariel is considered a mostly masculine name in some areas in the world.

Personally, I've only known one Ariel - the Disney princess one.
But even if it's typically viewed as a "girl's" name where you live, I say it depends on how much patience you have + how much you like the name..
If you think you'd get frustrated really quick having to educate people that yes - Ariel can be a boy's name - then it might not be a good idea. (You're more likely to get impatient if you aren't basically 'in love' with the name, too)
Me, I've been going by Robin - which a lot of people see as mostly a girl's name. Many haven't even heard of a guy named Robin, so they assume that boy's
can't have the name.
But, I really liked the name, so I went with it, even though I knew I'd have to explain it to a lot of people.

In my opinion, names are like clothes - they don't have genders. People do. And people just tend to associate certain names with a specific gender, because of what they were taught the name is for. But, that doesn't mean a boy can't have a "girl" name or vice versa. (After all, many "unisex" or gender neutral names didn't start out that way)
Anywho, I like the name Ariel.

It's a really uncommon name here, so that might have something to do with it. Hahaha