SAT score improvement 1420

I did SAT in March and got 1420. My math was good 780 but English scored low. I was devastated. In my practice tests, I scored 1520-1550. I am attending AP tests in May. I want to take SAT in June. My father is saying that I need at least 80-100 hours of preparation and practice to give my best shot and he is warning that I may not all that time with AP tests and school tests. He is suggesting Aug with good preparation in summer. I am worried that I may not have enough attempts before I apply for colleges in ED. I am tormented. I am spending 1 hour daily in English. Please advise.
Another question, Also I got selected for summer research in near by university. I am interested in research. Will it be useful for college app?

Or Should I take ACT

Don’t worry about SAT/ACT prep until after AP exams.

I highly recommend:

The Critical Reader, 3rd Edition: The Complete Guide to SAT Reading Three Edition
by Erica L. Meltzer
and
4th Edition, The Ultimate Guide to SAT Grammar Four Edition
by Erica L. Meltzer

Thank you. I will do after AP exams but it will give me hardly 3 weeks for preparation for June 2 SAT. I will do my best