Most of the fields are not sending

You need to include all the other mail-tags in the Message Body field that you can see highlighted in bold in the Mail tab.

e.g.
From: [your-name] <[your-email]>
Your preferred name: [your-preferred-name]
Your age: [age]
Your address: [textarea-address]
etc etc

Subject: [your-subject]

Message:
[your-message]

OK, thank you I did that and this is what I got when I filled out the form.

You can view what I did here please

I very much appreciate your help.

What I meant to say was that the message was There was an error sending your form, please try again later.

If that error message had an orange border then it thinks your submission is spam. If that error message had a red border then there is an issue with your mail server:

https://contactform7.com/faq/after-submitting-the-form-i-get-an-error-message/

It is possible that all those mail-tags together with no context is being viewed as spam.
Try adding a few in the message body to start, one on each line, with a hardcoded text descriptor. e.g.

From: [your-name] <[your-email]>
Your preferred name: [your-preferred-name]
Your age: [age]
Your address: [textarea-address]

If that goes through, add a few more, but always on new lines, and always with some hardcoded text.