I want to start learning Spanish, but I don’t know where to begin. Can you suggest a structured study plan or any useful apps, books, or websites I can use? Also, how long do you think it would take to become conversationally fluent if I dedicate about an hour a day?
To start learning Spanish, you might want to try apps like Duolingo, Babbel, Rosetta Stone, or FluentU. These apps provide structured lessons and exercises which are helpful for beginners.

For books, 'Madrigal's Magic Key to Spanish' could be a good starting point. Websites like StudySpanish.com offer a wealth of free resources, exercises, and audio materials. 

Your study plan could look something like this:
1. Start by learning the Spanish alphabet and pronunciation guide.
2. Move on to basic vocabulary and phrases.
3. Learn how to conjugate regular verbs in the present tense, then move on to the past and future tenses.
4. Incorporate learning common irregular verbs.
5. Start building sentences and get comfortable with Spanish grammar rules.
6. Practice listening comprehension with Spanish podcasts or watching Spanish shows/movies with subtitles.
7. Regularly review and revise what you've learned.

Try to practice a little bit every day, even if it’s just for 15-30 minutes. Consistency is key. As for becoming conversationally fluent, this is subjective and depends on your existing language learning skills, but with consistent study and practice, you might be able to get there in about 6 months to a year. Consider finding a language exchange partner to practice speaking.