6 months is a very short time. To maximise your progress, you should take every opportunity to practise- do you have English speakers you can communicate with? (If not, you can use forums like this, etc). Are you studying it at a college or schools? Do you have coursebooks to help you, a dictionary, a grammar?
OK- a few quick tips for online learning-
Dictionaries
www.dictionary.com
www.onelook.com
Grammar
https://www.usingenglish.com/glossary.html
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