Bertrand Russell wrote a lot of very accessible Western philosophy overview or survey books which I found orienting:
https://www.thriftbooks.com/w/a-history-of-western-philosoph...
and
https://www.thriftbooks.com/w/the-problems-of-philosophy_ber...
the former is online here:
http://www.ntslibrary.com/PDF%20Books/History%20of%20Western...
About this one he said :(paraphrasing from memory now), "A big book is a big evil. You may ask why then the author proposes to lay before you the present work..."
He's a hoot.