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I'd also recommend finding a YT course you like, see the Ultimate Beginner's Resource Guide for recommendations. One of which is Go! Billy's Beginner's Korean course, which starts with 한글.
Korean vocabulary app by TenguGo
Yonsei's course on Coursera (I recommend finishing "1. Introduction" of the Korean1 app first, it will be very helpful to skim through the course and affirm what you learned so far)
Cyber University of Korea's courses
Other good apps to have:
There's a ton of resources out there for learning Hangul (한글):
Apart from all of these links, my best recommendation is to grab a piece of paper and just keep writing so that they'll stick in your memory.
Hey! I started learning Korean recently too, I actually started on Tuesday afternoon and I can share you my experience so far hoping that it can maybe help you a little bit.
I'm a Spanish native speaker who can read, write and listen English at a pretty fluent level and who just started to tackle Japanese and Korean.
The story starts two weeks ago when I was bored out of my mind at my house trying to cope with this pandemic and quarantine. Thanks to YouTube I ended up in a Japanese speaking channel and said to myself: ~~"What a wonderful world...~~ "Hey, I have been always interested in the Japanese culture and gastronomy, why I don't start to learn now"
And lo and behold, I started my journey to find resources and to understand what I was getting into. Long story short, I found a pretty good page who guided me trough the first two alphabet's. With determination and practice I pretty much had both of them under my sleeve in a week or so. After that I started slooowly with Kanji. But don't be fooled, it wasn't just that page that helped me, they also linked some resources as practice, some context to understand why the Japanese had 3 ducking alphabet's and much more.
On my side, I searched and tried some apps that could help me and be my other guiding hand and yes, I did found some really useful ones.
Now, you probably thinking: "Why this fool talking me about all this Japanese and samurai shit while I was asking about Korea #1"
Well, be patient young grasshopper, I'm about to get to the meat and bones, the stock base for this delicious ~~ramen~~ little story. After all, one of the greatest things that 이순신 taught us was patience in life, patience against impossible odds.
Well we'll, I'll continue.
While I was clawing and gnawing my advance trough the Japanese alphabet, a lot of the resources mentioned, albeit briefly, this other languages as examples or as influences. One of the languages that was constantly talked or referenced was, you guessed it, Korean.
The more and the more I read, the more Korean and Chinese were mentioned. But one thing stood true after multiple articles and readings. Chinese language was a brick wall and Korean was literally created to be learned, streamlined (for the most part) and logical.
So, one fateful day I decided that maybe I should try Korean, right? Why not. And I must say, oh boi it was a blast.
First a did a little research about the history of Hangul, Google mostly, and with all the prior knowledge of how I tackled Japanese I set food/sail to conquer Hangul.
What did I do? Two things, Variety and quality.
I tried variety of apps looking for the ones I felt more comfortable with, that looked more user friendly, that appealed more. I settled for this one: Hangul it helped me with the first vowels and consonants.
Once I felt comfortable with it I went to the second resource I had in hand (Wich I already knew because I used it among other apps to learn Japanese): Lingodeer at least for me, this app is a game changer. Duolingo no more.
There is one more app, that I haven't used so far for Korean but was also nice, it's called Busuu. If you want check it out.
With help of Hangul app and Lingodeer I conquered the alphabet in 3 to 4 hours. After that I used Lingodeer to fortify my knowledge and started with the basics, I disabled the romanization of words and also downloaded the Korean package of Gboard to write some exercises to force me even more with the language.
3~4 days have passed and I can clumsily read pretty much everything written in Hangul and when I don't remember something I either go to one of those apps for help about a certain glyph or look in the internet about rules for pronunciation.
Variety and quality, use a variety of resources at your disposal that you find that are good, that are quality material, and you will be rolling. Don't just use one app, don't just use one resource.
I hope this ramble has somehow helped you to get some ideas about how to start your journey. If you have any questions, hmu.
Happy learning!.