What nobody is telling you about finding board members (but they should)
In most of the cases you will probably be bad at it when you begin, And that is completely fine - ESPECIALLY if you did not have experience with doing this before.
You will start by not knowing what you are doing and you will add/invite people who you think are good - AT THAT PARTICULAR MOMENT IN TIME.
If you are looking and interviewing, get in the habit of doing these 2 things:
1. Pipeline
2. Review your pipeline every month
You will be surprised to see how people you THOUGHT were good one month ago seem like a "warmup" compared to who you will be meeting later. It is a natural process. And if you see it and feel it you are on the right path.