Where are you planning to go in Florence? Did you already find something?

My brother lives there, here you are his suggestions: Center: ok: - oltrarno san frediano - sant'ambrogio - san marco not ok: - san lorenzo - stazione Outside the center: ok: - gavinana, - porta romana, - statuto - porta al prato - piazza liberta - viali - poggetto (lontano dal centro) - cure (lontano dal centro) - campo di marte (lontano dal centro) - coverciano (lontano dal centro) not ok: - piagge, - via baracca, - firenze nova, - panche

I plan to learn Italian next year. Can someone who lives in Florence tells me what a good environment to live and which ones are not, please? thank you