My skin is dull because I don't usually wear sunscreen... Is there anything that can help?

 hello. I am a male office worker.

I have loved outdoor activities since I was young, but I have rarely applied sunscreen or UV protection because I found it bothersome. However, lately when I look in the mirror, my skin tone feels a bit dull overall, and unsightly blemishes—whether they are age spots or something else—have appeared here and there, making me look much older.

I am thinking of visiting a dermatologist to start taking better care of my skin, but since I have never had any procedures done before, I have no idea where to begin or how to ask questions. For someone like me with uneven skin tone and many blemishes due to UV damage, what kind of lasers or treatments do you usually recommend? Please also advise on roughly how much I should expect to spend and how long the treatment should take.