EDITED to add info. Last names for baby. Legal advice.

I’m not sure what group to put this under. Also, I want to stay anonymous.

I left my husband almost 2 years ago. We’re still legally married, but I have no contact with him and haven’t seen him since the day I left. I’m pregnant and debating on whether or not to give the baby the dad’s last name (we are together), because he will not go get a job. I don’t understand why he doesn’t want to get one to help support this baby. I’ve tried talking to him, showing him how much clothes, diapers, etc cost, but it doesn’t work. I’ve told him that I’m not putting him on the birth certificate or giving the baby his last name if he doesn’t get a job and keep it. It’s like he doesn’t care. I still have my ex’s last name, since we’re still legally married, so the baby would have my married name if I don’t put the dad on the birth certificate. I plan on getting a divorce, money just has been tight. So, my questions are..

If I give the baby my last name, how hard would it be to change it once I’m legally divorced and change my name back to my maiden name? Also, how would I even go about doing that?

Thank you in advance.

I forgot to put that I’m in Louisiana. I called social security a while back and asked if a divorce has to be final before I could change my last name and the lady told me yes. I guess I could call the clerk of court or someone to get more detailed answers. I’d prefer not to give the baby my married last name, but I’m not going to give him his dad’s last name when he can’t even help support or provide for him. I know it sounds harsh/immature or whatever, but I’m at my wits end and I’d be damned if this man will go on the birth certificate then try to take my baby (he’s jokingly said he would if we broke up).