Catholics tend to use RSVCE or the like, there is a list on the USCCB website. I can’t speak for Protestants, though King James is popular. Though there are some anachronistic translations in King James it’s fairly good. However, be aware that Catholic and Orthodox versions have several books which Protestant versions don’t. So if you want a version which includes them all get one which includes the controversial books.
One thing I would recommend is reading with a guide or study Bible. The Bible is not an easy text to understand at first glance and contains many kinds of writings, from history to philosophy to poetry and law. Bible literally means library after all. So it’s easy to read a verse and not understand what it means if you don’t understand the context.