Mix into that a weekly lesson with italki from your home and you can learn any language at any age.
In addition it seems to be a good way to get rid of short video addiction. I don't use instagram or tiktok myself, but have a friend who did. Now she watches Dreaming Spanish instead. She is eight month in. Her husband just told me the whole family was flabbergasted when they where in Spain this summer and she answered in Spanish to a waiter in a restaurant.
My 10 year old daughter uses it, too. She likes to watch the Let's play videos and has watched the Stardew Valley series twice. So thats 66 hours x 2 = 130 hours watching Spanish videos. Her vocabulary is now a bit strange for a beginner, though. We recently walked through a garden and she was pointing out la regadera, la semilla, plantar algo.
I'm also old enough to remember when getting listening materials required going to the library for cassette tapes. Today, you can talk with a wide selection of native speakers, listen to essentially infinite audio and video content, and immerse yourself in a culture halfway around the world for the price of an internet connection.
I learned English with no Internet or smartphones, just school teachers, coursebooks and physical dictionaries. I wrote down new words from the dictionary into my lined notebook with a pen, solved the exercises from the book, translated texts by looking up words in the dictionary, searching for the page and the entry alphabetically. The coursebook came with an audio cassette. It was very much possible, but of course there are much more tools today. Spaced repetition software like Anki for vocabulary learning is a huge improvement I think.