Introspection:
Start with introspection. Recognize the main features of your accent and identify which sounds are causing difficulties.

Recording Yourself:
Record your speech and listen carefully to the recordings. This will help you identify specific aspects that are worth improving.

Emphasis on Sounds:
Explore the sounds that cause the most difficulty.
Take the time to practice individual sounds. Use words where these sounds occur frequently and practice their pronunciation.

Imitation of Native Speakers:
Watch movies, listen to podcasts, or chat with native speakers. Imitating them in pronunciation of words and phrases can significantly improve your accent.

Reading Aloud:
Read aloud in English every day. This will help your lips and tongue get used to new movements for pronouncing words.

Pronunciation Courses:
Consider signing up for a pronunciation course. A professional tutor can provide individual recommendations.

Remember that every accent is unique, and sometimes partially preserving your unique sound can be a wonderful accent in itself. Have you been told about your accent? Are you working on an accent?