Just being on the realistic side here and please don't hate me for it, but I have my doubts whether you can actually make this costume. It doesn't look like it would be excessively difficult for someone who knew what they were doing and had the time to put in. However, you've mentioned that you don't have any experience in this area of cosplay and you have very little time for the trial and error that all of us have been through.
Your best bet may be to try and adapt something pre-existing rather than try to sew from scratch. In this case, a leotard would be a good starting point. Try to find a matte one. From there you can add the shoulder pieces, the waist piece and all the other details. However, do be aware of the way your fabric stretches when you attach things to it.