Your basic choices are to hire a teacher or tutor, to exchange time with an English speaker who wants to practice your language, or to practice with another English learner.
Here are some informative posts by a respected italki member.
A beginner's guide to italki: https://www.italki.com/discussion/203952
How to write notebook entries: https://www.italki.com/discussion/204748
How to use the discussion section: https://www.italki.com/discussion/204809
Why it's difficult to find a language exchange partner: https://www.italki.com/discussion/106909