I am a newbie to this community too!
May I first correct your grammar mistakes found in your question?
"i want to speaking english more better"-is ungrammatical.-- you should have written "I want to speak English better", and you should always capitalize words like "I" and "English".
As to answer your question, you can voice with people if you want to practice your speaking. As for grammar, don’t be afraid of making mistakes. Sometimes it’s not that you don’t know the rules, but you may just have been careless. The best thing to do is to double check and proofread. Try to take some time to spot mistakes on your own writings and correct them before anybody else notices!