SICP, although an excellent book, is not a good introduction to programming.
 thoroughly explains why
[2,3] based on How To Design Programs  is a much better intro; you should read SICP after completing this
I am not an expert, but maybe because of that I believe that I can offer valuable advice to those who are totally new to functional programming (or feel that they are missing something), and want to get the core basics down cold without getting drowned in accidental complexity, do yourself a favor and start with edx's free moocs "How To Code"  , which are based on "How To Design Programs" . After that, you will cruise through the recommended classics above.
If interested in why if you are an FP newbie said material is superior to SICP , read the pdf paper "The Structure and Interpretation of the Computer Science Curriculum" 
Have you done both courses ( https://www.edx.org/course/how-code-complex-data-ubcx-htc2x is the second)? Your comment suggests you're only gone through one.
Beyond the courses, it depends on your goals and interest. I would stick with functional programming (FP) to avoid confusion right now, rather than moving to an imperative language. I would first go through PLAI (see http://racket-lang.org/books.html for a link and other Racket books) because I think understanding some programming language theory is super-useful. If you understand PLAI you're well ahead of most programmers IMO, and there is no need to read SICP. Learning a typed language such as Haskell, Scala, or O'Caml might be a useful next step. My own book, Creative Scala, is very much in the HtDP tradition ( http://www.creativescala.org/ ) though it might be a bit basic at this point. Beyond that, whatever takes your fancy.
A quick note on SICP: I don't believe in great books, more the right book at the right time. When I read SICP it was at exactly the right time for me, but I can see with retrospect the presentation is a bit old-fashioned in many ways. If you can work through PLAI you'll have learned most of the big lessons from SICP.
Thank you for adding that — I didn't know the edX courses were still online under a different name! The links from wikibob's comment for those interested:
I also love Gregor's teaching style and philosophy. It clicked with me and felt obvious and natural in a way the book never did.
Just wanted to note that HtDP is the best pedegogy for teaching the foundations of CS that I've ever found.
However, the book really needs professional editing.
Instead, take a look at the Intro CS classes from University of British Columbia .
They are taught by the excellent Gregor Kiczales, and directly follow the course structure from HtDP, in an extremely learner-friendly way. Absolutely the best online course I've ever done, Gregor really put an enormous amount of effort into doing this right.
You can take a look at the book How To Design Programs (HTDP) . It's similar. The 2nd edition printed book is going to be released soon . There is a paper from the authors of HTDP comparing it to SICP . By the way, there is an couple of online courses at EDX that covers content of HTDP .