If I could help you I would however the best I can do is offer advice. In all seriousness/fairness to your situation as well as others situation I say this: Make a PF group listing stating that it is a learning party. Also make it clear you have some minor experience to the point that you reached and someone (preferably the tanks or healers or both) with clear experience (possible multiple clears) would be greatly appreciated to help iron out the proverbial wrinkles. Sometimes honesty will set people off but you are more likely to catch more flak from dishonesty especially in Coil runs.
You may not get a group tomorrow or even this week but what have you got to lose? If you are adverse to that tactic you could, and I say this only as a last resort, use DF for experience. Now it is true that you'll be more likely to NOT get the clear you will however be more likely to run into those that have experience with it. You may very well get vote kicked. But that is a gamble on any instance/raid. Not everyone is a asshat. Sometimes what holds you back is your own concern that it won't go the way you hope or people will be rude (see vote kick/asshats) but is that really any different from real life in general? If you learn better from first hand experience like I do, while it may not be ideal, DF would actually go a long way toward your goal of getting the clear. At the very least you would get a better hands on idea of do's and do not's.
You are the master of how you proceed from here. T5 really isn't that difficult to get the hang of it is just menacing because of the content it is associated with and the amount of mechanics you need to learn. Which for the most part isn't that much if you watch what you are doing. Honestly the toughest thing I had to deal with was timing on dreadknights as a monk. Conflags, twisters, liquid hells, neurolinks, divebombs, etc. are just watch/timing mechanics that come with practice. The more you encounter them the easier it becomes to adapt to them.