How can you improve your pronunciation of “str” sounds in English?
You should probably minimize your usage of “I don’t understand”. NOT because there’s anything wrong with your English, but just because it’s SO BASIC.
Add some spice to the phrases you use. Try adding “I can’t wrap my head around it” into the mix. Just be sure not to overuse that.
Want to know a neat trick to add emphasis BESIDES using “very”, “really”, or “so”? Try the phrasing “more (adjective) than ever”.