How to learn English by yourself

There are plenty of options.

1. Find a social media group to ask your questions about English.
2. Estimate your grammar level by the British Council test. Check all mistakes and do exercises on them.
3. Register on some famous English-learning site and try how it is working for you. For example, Duolingo.
4. Check your listening and reading skills by the IELTS Online Mock test.
5. Immerse yourself in language. Switch your gadgets in English, watch movies, read newspapers, search for everything in English.
6. Install some dictionary to help you — for example, Dictionaries.
7. Add words to Anki and learn them.

There would be much more recommendations soon....