I finally decided to stop hiding the fact that i wish i was good at singing :/ and to try singin

[tidal moat]

i need some feedback and advices on what to do with my voice to get decent results

oh also me singing in english is very bad

i can but it always sounds bad

i also fear being heard by people so i can't sing loud

[red glen]

(disclaimer i am not a vocal coach so despite my singing experience my explanation may not be helpful) this is much better than i expected from the title, which is good! in my opinion, your main issues outside of volume are mumbling and pitch accuracy. i could whisper-sing these lines at the same volume and itd sound different from mumbling the words even though its at the same volume. really enunciate consonants and when you sing your vowels open your throat more and try to make a clearer sound so the word is clearer
as for pitch accuracy there's plenty of exercises on youtube that help, the important thing for you is just that you're keeping the note stable (like not wavering out of tune while holding one note) and cleanly switching between notes (like going straight from Do to Mi without singing Re, if that makes sense). doing vocal scales every day might help with both of these issues :)