Hello im from England
I'm going to champions alone but decided to stay in LA longer then needed. what would people suggest is fun to do alone in LA and the surrounding area
On a serious note, I would visit the Griffith Observatory,(even though it’s crowded). Park at the very bottom to avoid crowds and walk up.
The only thing that I am begging for you to do is make reservations to the Getty (100% free). It is a great museum of art and I loved it. You can also visit the Getty Villa if you love art alot, but the Getty is a lot larger.