The answer to your question requires a careful review of the proposed non-compete. The law in this area is not easy to understand.
I realize it is difficult to justify paying a lawyer to review the agreement. If you choose not to, be prepared to abide by the terms of the agreement.
You can attempt to negotiate the breadth (what you can or cannot do), the geographical scope, and the duration of the agreement.
In Texas, an employer may make execution of a non-compete agreement a condition of (new or continued) employment. That includes temporary or seasonal employment. While being told “sign it or leave” may have felt like duress, that alone will not invalidate an otherwise enforceable non-compete agreement.
In Texas, covenants not to compete are governed by Texas Business & Commerce Code §15.50. I have included a link to the BCC §15 below. You can skim down to §15.50 to read the statute.
Generally, if the non-compete is directly related to the employment, restricted to the employees activities and a reasonable geographical area, and secured through valid consideration (which generally means continued employment or some sort of monetary incentive), it will be enforceable. The most recent precedent from the Texas Supreme Court on this subject is the case of Marsh USA v. Cook. I have included a link to this case below, so you can review it and see that the courts will generally enforce a non-compete agreement which meets the requirements discussed above.
I strongly encourage anyone who is considering a non-compete arrangement to consult an experienced labor and employment attorney and go over the document item by item.
Your question has been answered as a courtesy. This is not paid legal advice. Nothing in this communication is intended to create an attorney-client relationship. Unless expressly stated otherwise, nothing contained in this message should be construed as a digital or electronic signature, nor is it intended to reflect an intention to make an agreement by electronic means.
The company only has a protectable interest in the product that it wants you to sell to its customers. It does not have a protectable interest in unrelated products and services. The scope of the non compete should be narrowly drafted so that it does not restrict your ability to sell unrelated products and services to the company's customers.