I changed my first name. My given name (a French name with accents) was impossible to pronounce/write wherever I went. My family is not French nor do we live remotely close to France. As a result I was relentlessly bullied about it ever since I was a child. I often spoke out about this to my parents, wanting to change my name since I was about 8 years old (it was really that bad). They never allowed me to do so and forced this identity that I did not want upon me. My parents took me wanting to change my name as a personal insult. They could have saved me a lot of hurt and willfully chose not to. Changing my name to something that I chose and wanted allowed me to work on building my own identity and figuring out who I wanted to be. It takes some time getting used to and might feel dissociating at first, but in time it was a healing experience. Nowadays my family still uses my given name and I cannot force them to do otherwise, and I think it will be hard for your partner to get used to as well. You need to consider whether you are only going to introduce yourself to new people with a new name or if you are going to ask all of the people you currently know to start calling you by your new name as well. Ultimately only you can decide whether or not you are doing this for the right reasons and whether or not you are able to get used to being called a new name. Legal work is a hassle but ultimately doesn’t matter if you decide to go through with it.