The best way to improve your English:

1. NEVER EVER use ANY online translators, they are nothing but utter rubbish!! English is practically EVERYWHERE in the online world these days, you just have to use your imagination to find it! Learning pace is always personal, it takes the time it takes so there is no reason to hurry it up too much. If you do, you will not learn so well. Also, please learn the basics of the standard English first before advancing to finer details like dialects/accents. A word of warning though: Do stay well away from overrated, overpriced and overhyped language "gimmicks" such as Rosetta Stone, they really are NOT worth for checking out! Also, never mind about your accent, as the main goal for you is that others understand you and you being able to understand other speakers.

2.Listen/watch: Keep listening to internet radio stations like BBC, watch TV shows in English (use only subtitles, NOT voice dubbing in case you are not a native English speaker!), etc.

3.Write/communicate: Try to find discussion forums from the web about things that you find interesting and FUN (music/various artists, hobbies, etc.) and start communicating there with other people using only English. Start using instant messaging systems in case you find some new friends or start emailing them. Please do NOT be afraid of making mistakes or hesitating, because even native speakers do make mistakes and do hesitate at times! The more you enjoy communicating, the better!
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我英语也很渣，加油吧↖(^ω^)↗！