Hello
TO be good at English is not easy at the same time is not impossible all what you need is practice practice and practice
before that start with what you learn in school join som English classes
and if it is available you can watch movies dont be worry if you could not understand at first this is normal okay
listen toEnglish as much you can and try to use some new words in conversation and blah blah blah blah there are many things in fact
start step by step and you will reach your goal
God with you