Doing a name change when getting married is super easy and one of the easiest ways to do it. All you have to do is enter your current name and your new name on the marriage license.

When you renew your DACA or do your AOS, just use your new name and provide a copy of your marriage certificate that will show your old name and new name.

After the marriage and once you have your marriage certificate, you will then have to go to all the various offices/agencies that have you on file and update your name... Social Security, DMV, employer, bank, credit cards, insurance, etc. All of that can be a pain.

I kind of did the opposite of what you did. I got married late last year and hyphenated my last name adding my husband's last name to mine. He did the same. My marriage certificate shows all of that.

Good luck with the wedding and your eventual AOS!