I used to love learning languages for the fun of doing so. Because I'm a freak.
Anyway... Of course you need to watch films and stuff like that, but the idea you could learn from doing just that is absolutley absurd.
The formula for language learning is not complicated. I have always avoided courses and programmes of language learning largley due to how unnatural they are and even ones which try not to be- how disproportionatley expensive they are in comparison with books, without any particular advantage. Suspicious. I have always found it a curious phenomena that it is widley considered that teachers/ instructors is a valuable part of the process of education, rather than a hindrance. Anyway...
I would begin by learning the most common words and a bit of grammar and then begin constructing sentences whenever I could. They would obviously be ungrammatical and lack much vocabulary: 'I like you' 'Where am I?' e.t.c. I would have a dictionary of whatever language I was learning in my pocket wherever I was and when I was around (like a child asking their parent or something) and I wondered 'how do you say that in... x', then I would look up the word. It gave me something to do on the train. It is a very good habit and I would find myself wanting to find out how to say certain words quite automatically- additionally, I didn't have to go through all the pointless irrelevant 'vocabularies' of most books and courses about the weather, animals or clothes- but cut straight to trying to say stuff that would occur in a real life context. Then I memorised large parts of the dictionary using mnemonics, and use the words I had learned in talking largley to myself. Talking all the time in the learned language was important because it was constantly inadvertant revision of the words and grammar I had learned without the tedium of drills. I never do drills of any kind. Then to compliment this process a healthy dose of structured learning of grammar and vocabulary. Then to push myself I would try and read a book in that language (or I have done so for french and german) and with a dictionary by my side to be used as sparingly as possible I would read through it. For european language, books in that language are relativley easy to obtain. Then, of course, if you can go to the country (for me in most cases this was the source of me wanting to learn a given language) then you learn at a vastly quicker rate. I would say my approach is quite natural and I reckon it would be easy to learn the basics of any language quite quickly in this manor.
It annoys me when I reflect on it how much my supposed education has destroyed my enthusiasm for language learning by making it the most patronising, boring process imaginable and has actually made me worse at French because I hated my teacher and refused to read/write/talk anything French, therefore. On that topic, when I sat the exam, I understood every word the people were saying but the format of the exam actually made me lose one or two marks

Foreign Language is something which I think is taught exceptionally badly in a very bad education system, along with music and mathematics especially.
Anyhow, I hope this has been of some help.
p.s
Make an effort with the accent. Accents are generally easy, but most people don't bother simply out of not wanting to sound embaressing. Ironically, there is nothing more embaressing than making no effort with the accent. Certainly in my experience if you do this and try and converse with native speakers, they will switch to English because it will be assumed you are incompetent. As long as you don't do a silly offensive accent, you'll be fine.
''To go wrong in one's own way is better than to go right in another's.'' Dostoevsky's Razumihin.