Don't be discouraged. Just concentrate and you will be able to do it. You've noticed a lot here so just try to put some of what you've learned into practice.
Make sure there is a big difference in style between Task 1 and Task 2.
I don't think you should have a big problem in Task 1: Just make sure to have an "Overall,.." statement in your introduction, and be as objective as you can. No subjective "I", no "we," no "as you can see," no "the graph shows us that if people in France don't stop using nuclear power there will be a huge environmental disaster for our children."
In Task 2, underline the keywords, brainstorm, pick related words and ideas, and write synonyms. Don't start writing until you have six ideas.
Have a good thesis sentence in your intro which tells the reader what you are going to say. Have a clear central topic in each paragaph. Have a topic sentence at the start of each paragraph.
Add some short sentences - perhaps the topic sentences or a short expression or opinion. Have some long sentences, but don't have any over 25 words. Keep the average down! There's a big difference between conversation and IELTS Task 2 writing.
Don't rely on tired old phrases. Add one or two links between sentences, but not for every sentence. Let your ideas and examples do the work.
Remember Task 2 is about YOUR opinion. Give your opinion. That's what the question asks you to do. Don't hide behind experts or passives or scientists or recent research.
Check for subject /verb agreement ("he goes," not "he go"). Check every noun to see if it needs an article ('a, an, the'). Remove unnecessary commas.
And don't write too much. A page and a quarter or a page and a half is fine for Task 2. Print out this sample IELTS Writing Task 2 Answer sheet from the official IELTS website, and practice writing by hand in 35 - 40 minutes. For most people with about ten words per line, 300 words is about a page and a half. There are 20 lines on each side.
It’s important to practice by hand at least once or twice. Typing on the computer is not the same. You don’t have time to reorganize when you are writing by hand. You have to get it right the first time.