The conclusion part of the essay is the most important. With the support of the previous paragraphs, the conclusion must not start a new argument nor can it support the positive or the negative side of the topic. It must restate the thesis from the introduction paragraph and make a general statement about the facts that have been discussed in the essay. In other words, the conclusion should be unique and remain neutral. It can be a good idea to end your essay with a personal opinion about the topic. The opinion should be supported by the information provided in the previous part of the essay.
So if you are concerned about your writing skills, consider getting some help with things like paragraph structure, punctuation and grammar and spelling. Most colleges provide this free and you will also be able to find many free resources online. The first thing you need to be clear about before you start your essay is the type of essay you will be writing.
Remember that the introduction denotes the first paragraph of your essay that should be a short paragraph in which you should develop the points related to the subject of your essay. It should make the reader interested in having a further look at your piece of writing.