God-damnit, lost my whole entire post, but anyway, just immerse yourself.
→ Install ALL software in Spanish
→ Change ALL of your software to Spanish-language configurations (Skype, League [may require changing to Spanish-speaking region], Web-Browsers, O/S, Locale, Regional-Settings, ANY and ALL other computer-programs).
→ Repeat segments of movies/documentaries that have sub-titles until you can instantly translate it both ways (English to Spanish AND vice-versa) without needing to reference the sub-titles
→ Cambiar su configuración del teléfono celular en Español
→ etc
https://www.youtube.com/watch?v=DrIu28JKiEE&start=01:34&end=02:46&loop=100 (English portion with Spanish sub-titles)
https://www.youtube.com/watch?v=DrIu28JKiEE&start=02:46&end=03:00&loop=100 (Spanish portion)
I linked an exercise for you. For the part that does not have sub-titles, just use the You-Tube sub-title option, hovering your mouse over the lower-right portion of your screen to activate/disactivate. See if you can IMMEDIATELY give the Spanish-translations in your mind as the doctor is talking until you can do it WITHOUT needing to read the sub-titles. I have it currently set to loop for 100x. Then try doing the same for the portion where the Narrator is speaking in Spanish (then write down the English-equivalent of what the Narrator was saying and re-read the sentences until you can translate it immediately into Spanish WITHOUT needing to look up the Spanish-references).
Not going to bother re-writing my other three paragraphs but they're highly relevant to your language-learning. I speak multiple languages so I know exactly which methods are the most-effective for faster fluency. I suggest that you primarily focus on vocabulary that is relevant to your profession. For example, learning about vocabulary on casting magic-spells and spirit-world adventures, such as from an animé-episode, will be less-likely to be of use to your profession, unless of course for some reason all of your co-workers seem to be frequently getting into such discussions. Next time you do a You-Tube video look-up, perhaps for doing some of your home-work, try doing the exercise that I have just given you until it's ingrained into your memory.
I don't know what your learning speed is but normally you SHOULD be able to have 3-4 sentences completely memorised within a half-hour-period. ALWAYS do a review the following day to make sure that it's been fully saved into your conscious-memory. Otherwise just repeat each exercise the following day and add the same amount of content to practice. Also, language-courses are PRIMARILY for learning the GRAMMAR, but the method I gave you will give you the VOCABULARY that is RELEVANT to your profession MUCH more QUICKLY (due to most language-courses being mostly focused on traveler-vocabulary for beginners... unless of course your work is mobile rather than solely in one location such vocabulary would be of less use to you).