I recommend the book Do You Talk Funny?. It's geared towards public speakers, but I loved the step-by-step approach to creating funny anecdotes, and those anecdotes can be integrated into normal small talk. He also addresses the "nothing interesting has happened to me" worry, and says it's more advantageous to use an anecdote about an ordinary event (like missing the bus) than something fantastical, because ordinary experiences are more relatable.
For everyday small talk, I recommend The Fine Art of Small Talk and The Art of Showing Up. The first one is, again, geared towards business networking, but the basic concepts still apply. The second one is great because it gives a ton of scripts for specific situations. For example, in the "grief" section, it gives scripts for "what to say if a friend lost a loved one" vs "what to say if a friend found out they have cancer" vs "what to say if a friend's loved one is incarcerated." I think the second has a bit of a feminist overtone in certain sections, so just be aware of that. It's geared towards women, but the advice can be used by anyone.