How to simplify the input form

I need to simplify the contact form:
– remove the category
– remove the captcha

How to do this?

1)
Setting the captcha thing to true as you suggested in another post, works, but there still appears an error message on the bottom. How to get rid of that? It is very confusing to visitors.

2) the category is not useful to me and confusing to visitors. How to get rid of it?

Please respond quickly, I am trying to do this for some very unhappy people who might feel better if they can light candles in a simple way …

https://www.harriettedaniels.nl