Estás en lo correcto, es un error tipográfico. La palabra correcta es "podremos".

Es lo mismo, depende de cómo lo pronuncie cada persona. Es bastante común que las personas de habla hispana a veces cambiemos la manera de pronunciar esas letras incluso en una misma oración :) Ambas letras deberían pronunciarse como "j" en inglés, pero algunas personas a veces usan un sonido más suave como "y" en inglés. Sin embargo eso no cambia el significado de las palabras.

I would translate it like this: "You do not know how I appreciate the information you gave me, it's truly guiding for me" That's because the word "orientativa" in the way it's being used makes reference to "help" or "guidance"

Hi Michael, It would've been helpful if you'd posted the original text in English. That way it would be easier to translate into Spanish maintaining the whole context, therefore corrections would be more accurate.

Hello Mia, Personally I think that having a particular accent is not such a bad thing, actually most of us who are non native speakers have a little bit of it. The important thing is to able to communicate with others and get understood. Now regarding to your question, what I found very useful is listening to music in your target language whether is American or British English (I'd recommend to stick to just one of them and not mix them), watching movies with subtitles as Martin recommended above is also very useful. Listen to the pronunciation and intonation as much as you can, then repeat it to yourself and try to imitate. The key to success is to listen, listen, and listen! :) Basically that's what I'm doing to learn German ;) Best of Luck!!