UNCONTESTED DIVORCE is cheap and simple in some way. However, depend on the states, process can take from weeks to months. Also you might lost something during the negotiation. So DEATH is relatively economical.
如果在能確保他不影響他的身份並在未來一年內能獲得綠卡的情況下,是否可以現在就可以實施離婚手續?
Regardless I-485 or I751, you will provide false information to USCIS. That is illegal as hell. You dont want to do that.
3。是否我們可以自己申請而不需要律師協助?
You can. Strongly NOT recommend that. With child involved, you want to secure a good childhood for the kid. Plus there will be minor details that you have not mentioned here and yourself might overlook.
Divorce is messy and you want to get as much professional help as possible.
Death is the cheapest way to divorce. - that is a fact. Real life sucks, and we all have to deal with it. Now it is time to fix your will so your future Ex will not get too much if you get unlucky tonight and XXXXX happens.