Recommend private schools for sixth form with full funding

Hello, I'm Mereilim from Kazakhstan. I've always dreamed of studying and living in the UK. I'm about to finish my last year of school (11th year) and plan to apply for sixth form in the UK. Currently, I'm looking for private schools to apply to. However, due to financial constraints, my family can only afford schools that offer full scholarships covering both tuition and boarding.
I would like to get advice and recommendations on schools and admissions. I've heard that private schools in the UK require strong academics and extracurriculars from foreign students, I don't have anything particularly outstanding, so I think there might be some challenges A bit about myself: I plan to graduate with honors, was the school president, and often participated and won subject-based competitions (though not at the national or international levels). I've been teaching math to grades 6-9 since the 8th grade, organized regional competitions, and conducted environmental education conferences
I successfully completed a 6-month national challenge, earning a medal that offers some advantages for university admissions in Kazakhstan. I used to run a book-related channel with around 8,000 subscribers.
Additionally, I am good in drawing and 3D modeling, both of which I’ve taught myself.
Can you tell me if I am good enough for a private school? And what IELTS result is needed for school? And can you recommend schools? Not necessarily prestigious and the best schools, but with good academic preparation and preferably a school focused on local than foreign (I just want to know the real English culture)