A 1400 on the SAT is not a bad thing, it just means you need to work a little harder to get your score up. Since you've already got a PrepMe course, take advantage of all the lessons and quizzes they have. My son started out around where you were, and his score increased to 1760! So definitely work at it, and you'll have a good score in no time =)

don't forget that you can take it multiple times and give your best scores to the schools. the best thing you can do to improve is practice. keep working at SAT questions and you'll get better. just make sure you understand every question you get wrong