Can you give me advice on applying to MIT?

I’m an international students living in Saudi Arabia.
My academics:
• 1450 SAT (800 Math)
• 760 SAT Physics
• 800 SAT Math Level 2
• 3.9 GPA
• I didn’t take the TOEFL, but hopefully 100+
My Extracurriculars
• I tutor my brother and his friends.
• I’m an intern at Marj3, an online platform that has 250,000+ followers.
• I applied to Yale Young Global Scholars.
• I was a manager at a 50,000+ facebook group for 2 years.
• I read a lot.
• I workout 1 hour a day.
• I’m a participant in a scholarship in which the top 0.1% of participabts will get a Udacity Data Analyst Nanodegree for free.
I hope that you answer me soon.

If you can comment on my English level, I will be grateful.
Thanks in advance.

MIT is a reach for everyone, but particularly for international applicants. You stats are in-line (well, your SAT verbal is a bit low), but MIT caps the number of international students in each incoming class, so the acceptance rate is below 3%.
http://mitadmissions.org/apply/process/stats

It’s hard to tell what are typos vs incorrect usage.

Thanks for your reply.
Are my extracurriculars good? And can you recommend extracurriculars that relate to Math, CS, and Engineering?

The MIT website is full of information about how they want students to prepare. Start here:

http://mitadmissions.org/apply/prepare/highschool

Be careful of extracurriculars that suddenly show up late in your high school years. Admissions counselors are skilled at spotting ECs done just to look good for a college resume.

For the ECs that you list above, will your application be able to convey who you were in those ECs? What happened because of you?

I agree with the above post by AroundHere. Read through that MIT website carefully.

I will get a recommendation letter from the platform I’m interning at.

Unless you get accepted to these, it’s probably not worth listing these on an application to MIT – I presume virtually anyone can apply to YYGS?

MIT has specific requirements on your letter writers.
http://mitadmissions.org/apply/freshman/recommendations

Please spend some more time on that mitadmissions.org website. They’re telling you what they want.