Correct?

"To begin with, Ms Hart estate planning is a crucial part of someone’s financial plan and this planning gives instructions on how their money and savings should be distributed after their death. So, the validity of will, which is the disposal of real property, and testament, which is the disposal of personal property, requires being 18 years of age, having a soundness of mind, which means one can not be influenced by the others, writing, signed document, attestation and having two or more competent witnesses. Therefore, your previous will is invalid since you were under the influence of someone whether you were drunk or not, thereby making its cancellation valid. If we come to the second topic, since you want to exempt one of your children from your estate in will, all previously made wills are revoked to execute a new one." Is this paragraph correct?