Can I join a high school in the United States after o level

Hey I have finished my o level exams in may 2018 and I got a result of 3A 2B 1C and 1D I live in Bangladesh and I want to complete the high school in America because A level I tough for me so can
I go to the United States and get a admission in high school and finish it ?
And after high school can I get into the University in the United States or Canada without any problem?

Your options largely depend on your immigration status. If you need a student visa to study in this US, completing high school in the US will be expensive. Your options for high school are:

If your family is moving here, you can enroll in the public US high school that is is the one students from your neighborhood attend. Depending on how your records are evaluated, you might be enrolled as a 10th, 11th, or 12th grade student. @MYOS1634 may have more specific advice about placement.

Some private boarding schools admit international students. You could ask for help with those schools in the Prep School Forum http://talk.qa.collegeconfidential.com/prep-school-admissions/

After OLevels, placement is usually 10th or 11th grade.
Make sure your precise O’Level classes are clear to the GC - ie’, Pure Maths/Further includes precalculus honors and the beginning of calculus, Foreign Language O’Level is similar to level 4 and should qualify you for AP…