Requiring a contract of employment and a NDA for a new business

The new business is an online educational academy that provides virtual lessons help and tutoring in specific subjects. The tutors that we hire are going to be classified as self-employed so a contract of employment is needed with some specific clauses such as how many weeks notice before they can leave, their stipulated salary etc. In addition, there are some new ideas in this business model so a NDA is also needed for them to sign before we discuss the business with them and before we show them the contract. I look forward to working with you and hearing your best ideas on how to achieve this.