Love that you're picking up a new language, but that sentence sounded oddly specific. It's akin to saying I'm learning Australian or British English as opposed to just English. Yes, there are vocab and sometimes grammatical differences (e.g. I lost the key vs I've lost the key), but it's 99% the same language.
I don't find it that odd. As I'm sure you know, there are fairly large differences in pronunciation. Larger than the differences between European and Latin American Spanish, for example. I read once somewhere that in Brazil, if a Portuguese person is being interviewed on TV (on the news, for example), often times they will add subtitles. I am also learning Portuguese and whenever I search for resources, I make sure they are for the Brazilian variety.
If you go to the OS language selection on your computer, you'll probably find 'Portuguese - BR' (Brazilian) and 'Portuguese - PT' (Portugal). Sometimes you'll find subtitles on Netflix described as either Brazilian Portuguese or Portugal's Portuguese. It's the same language, but the difference is way greater than australian and british english. Sentence structure varies, some vocabulary, etc.
As someone who is familiar with both, they're slowly becoming different languages. The pronounciation is radically different, the grammar has already differed in some pronouns and conjugations (e.g. gerund) for a long time, vocabulary differences are slowly accumulating and we'll see how orthography continues to evolve. We're not quite at the Scots vs. English point yet especially because of shared media but it won't surprise me if it doesn't take too much longer to surpass that.