Build Your Foundation: Don't worry about words, grammar, or anything else until you can read and pronounce Korean letters and syllables. Without this foundation, progressing in other areas of the language will be much more challenging.
I will include the Romanised equivalents of the Korean alphabet for reference. However, I strongly recommend that once you learn to read Korean, you stop relying on Romanisation entirely.
Master these characters thoroughly. Memorising them may be challenging at first, but it's essential. Fortunately, the Korean alphabet is relatively simple, though it may initially feel unfamiliar to English and other language speakers due to its completely different structure.
