My spouse and I we both are computer engineers from Mexico working under TN Visa, for different employers. In order to obtain a Greencard, we both asked for our employers to change to H1-B. Only my spouse was accepted to be sponsored. Our goal is for both to get a greencard. Can I apply for a greencard after my spouse gets one? I will still be on a TN Visa, so I don't know if that's possible. Can I still be working under TN if I applied for an H-4 visa and filed for permission to work under H-4? What would you advise? Thank you so much for your help!