I want to learn Turkish! Besides using Duolingo, is there another good way I can immerse myself?
Even at my intermediate (B1) level I find soaps difficult so don't get depressed if you find them impossible. I don't know if "Haberin Olsun" (children's news) from TRT Çocuk is available via the web?
I guess from your question you live in an English speaking country and and are a native English speaker. So it is probably best for your girlfriend if you mostly speak English between the two of you and don't irritate each other with too many language questions. If you don't have a chance to visit Turkey soon then perhaps your girlfriend has a friend or relative (maybe not another young woman in case she gets jealous!) who wants to learn English and who could swap conversation correction either in person or online. If so make sure they actually correct and drill you, not just politely ignore your mistakes.
If you do a search, I'm sure you'll find lots of ways to learn more Turkish. Here are just a few websites that I think are good for beginners. I have used them all at some time, but I'll have to say that I prefer Duolingo.
I like the podcasts on Turkish Tea Time. They teach the grammar in a nice way. You listen to a dialogue, and then they explain the vocabulary and grammar in the dialogue. You can listen to the podcasts for free, but if you pay the subscription you can get the dialogues, transcripts and grammar notes as well.
I also like Lyrics Training. You can practice listening to Turkish songs (and other languages).