They won’t assume that just because you have an email address that means that you will allow your kids to use internet. Most shadchanim will anyhow assume you have email and ask you to email your resume.
You could have email access at work, or your parents could have a computer even if you are not planning on having one in your own home, or you could be using a friend or neighbor’s computer. Many people have email addresses even if they don’t own a computer, and most shadchanim will not even think about it.