Which do I use? "hoy voy a" vs "hoy hago"
Which do I use, how and when, what is the difference?
2 Answers
The difference is you are using two different verbs, ir (to go) and hacer (to do/make). The 'how' and 'when' depends on what you want to say.
Welcome to the forum. I'm afraid we really need the rest of the sentence to know.
Hoy voy a + infinitive = Today I am going to (do something)
Hoy hago = Today I do/am going to do (literally). It would change depending on what follows hago.