Im 19 and learning Spanish. I would say I’m at the beginning of level B1, I suppose. My mum is Spanish and my dad moved to Spain when he was 5. They speak Spanish to each other, only speak English to and for me. I was not raised bilingual unfortunately, only with English since I was 3, all my schooling done in England. I’m trying to read only in Spanish, books, fanfiction, etc. and watch in Spanish (my Tik Tok is Spanish, I only like Spanish speaking videos so I can improve my comprehension) on my Tik Tok I have subtitles on and with films/series I don’t have subtitles just Spanish speaking. Recently my mum said to me to only speak in Spanish, even if what I say is wrong. So with me only really speaking Spanish along with my parents, and them correcting me. I can understand quite a bit of what my parents say in Spanish and can answer most things when they ask me questions in Spanish. With that immersion along with reading and watching in Spanish everyday. How long roughly, I know it won’t be fully accurate, to get to fluency like C1/C2. Next summer I will take a month intensive course in Spain, but that’s in 11 months, then I have 15 days in Spain with my family (uncle, cousins, aunts/uncles who are all Spanish and know very little English. So I guess how fluent can I get, in my circumstances, in a year?