Theologically speaking, as people have said, generally speaking, one baptism is considered valid throughout one’s life. That said, I know some people who decided to get rebaptised because they had fallen away from the faith and decided to return or they hadthis wonderful conversion experience or they decided to become active in their faith or for whatever reason they decided to be rebaptized. It was important to them and the people I know who did it, it was something they never regretted. Therefore technically speaking you can get rebaptised even though it goes against church teaching.
I was considering it at one point and my spiritual director mentioned the idea of having a rededication ceremony where you rededicate your faith to God. I don’t know how it would work because it was an idea that never materialized further than an idea but it could be another option that follows more with the church teaching- regardless in both cases, you would have to ask your priest and see what is possible.
I know in my case becoming Catholic, the entire 1st communion and confirmation became a rededication service and it was awesome. I ended up having a little reception afterwords with some food and some friends. I also did not join the church at the regular time as in most people become Catholic at the easter vigil mass, I became Catholic on a separate Sunday as part of the Sunday mass and that was so special. It was easier. Message me and I’ll explain more about it if you wish.