Jasmin,
Your storyline IS your plot. One is just more detailed than the other. There are only so many plots in the world and all of them have been done. You will never write anything new, however you can put a new spin on an old plot. A climax is part of the plot. If you have a plot, then you have a climax. Maybe you need a class in writing, not just a generic English class. Check at your local adult education center or community college; some recreation centers or libraries in bigger cities hold them too. You should also hang out in the writer's areas of this site, there is a wealth of information there. Take the time to check your spelling and grammar, it shows a bit of professionalism, and even if the story isn't the best, it shows you care.
As for getting the feedback you want, ask questions. Start a thread, and pose the questions you want the answers to in the correct forum. Ask the readers what they thought of particular parts or the plot in general. Find one or two that you trust and really pick their brains apart.
Lugh