Mechanics/ Grammar

In writing, the common mistake that I always do is the application of the grammar. I understand the basic of grammar such as Simple Present Tense and Simple Past Tense but when come to Present Perfect Tense and the others I get confused with the Simple Present Tense and Simple Past Tense. In my mind, should I use a Present Tense or Present Perfect Tense when come to make sentences? I find that writing in English can be difficult because I need to use a proper grammar so the meaning and the structure of the sentences are delivered well. The first problem that I face when I start writing is I confuse which a correct grammar that I need to use when I writing. My suggestion to overcome the problem is more practice and read English articles, because through it I can learn and improved my grammar.