Is it normal to develop a mixed accent later in life?

I have a question about accent/dialect identity. I grew up mainly speaking the standard form of my language in a more urban environment, so my speech has mostly been standard for most of my life. However, my family background is strongly connected to a regional dialect. I was exposed to it growing up, but I didn’t actively use it much when I was younger. Recently (in my late teens / early adulthood), I started to feel more connected to my family background and identity, so I began to intentionally use and learn more of that regional dialect and intonation. Now my speech feels mixed. Sometimes I naturally use the regional accent without thinking, but other times I still sound mostly standard. It doesn’t feel like I’m “pretending,” but I sometimes worry that my dialect might sound unnatural or “in between” to native speakers of that region. I’ve also seen people criticize “fake” or exaggerated accents in media, which sometimes makes me overthink whether my own speech sounds strange or inauthentic. Is it normal for people to have this kind of mixed or shifting accent when they reconnect with a family/regional dialect later in life? And do native speakers usually view this negatively, or is it generally seen as normal variation?