Understanding Lo vs Le

Hello, so I've been learning spanish for about a month (also took 2 or 3 classes of it in high school) and I thought I had a grasp on les/los/le/lo, but after buying a spanish book, I'm stumped.

So the sentence is "Julia lo mira" which I instantly thought meant "Julia looks at it", but no, it means "Julia looks at him."

I'm just so confused now because I've just been learning that Le/Les is him/her/them

If anyone could help I would greatly appreciate it, thanks!

submitted by /u/perpetualinsecurity
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