ESL CHILDREN CLASSES

My family and I are moving from the Caribbean to Weston, FL next Summer.

My childrens native language is Spanish. My daughter reads, writes and speaks English but with difficulties. She is currently in 4th grade. But her reading level comprehension in English is as a 2nd grader .She is my main concern at this time. Her actual curriculum is mainly in Spanish with some subjects in English (Maths, Language Arts, Science) but since we are a Spanish speaker country is not the inttention of the school to have the same level in English as the schools in USA.

My specific questions regarding this matter are:

a) Will this be a real problem for her performance at school?
b) All Weston School offer ESL Programs? How does this program work?
c) Does she need to be 10yrs to entering 5th grade? Her birthdate is November, after school year starts.
d) She only writes cursive. Is this a problem? I've heard it's required for kids to write blocks.

Thank you very much for your help!