Inspiring, encouraging or positive short novel

Hello,

I’ve been trying to keep my anxiety and negativity in check and have been looking for short novels that lean toward positive feelings. Something like “Star Trek The Next Generation”: inspiring, encouraging; even though there are difficulties we learn, adapt and make mistakes. But at the end we’ll make it and we’ll get out of it better than we got into it. 😅

Possibly sci-fi or scientific, or adventure (eg the Hornblower saga)

(Sorry couldn’t find a better way to describe it 😅)

Thank you for any suggestion!