yo es muy bueno
Doing good = haciendo bueno but this sounds terrible in Spanish. Generally speaking you should say "doing well" which is haciendo bien.
Muy bien, gracias. (Very good, thank you.) Muy bueno, gracias. (Very well, thank you.) You estoy bien (I am doing good)
No muy buena is the best way to say "not very good" in Spanish.
El está haciendo bien
What you have written is --- Your spanish I'm very good What is correct is Su espanol es muy bien --- your spanish is very good Or Su espanol esta muy bien --- your spanish is very good.
Estoy bien = I'm OK/doing fine etc.
this means... i am very well i am doing very well
Doing good = haciendo bueno but this sounds terrible in Spanish. Generally speaking you should say "doing well" which is haciendo bien.
Translating "doing the best", best being "the most good", the phrase is "Haciendo lo mejor".
Very good. If that is your score keep doing what you're doing.
very well - muy bien very good - muy bueno
That's not even a good sentence in English...