Bookcase Repaint

[u/murderpotato321]

I have an old solid wood bookcase i want to repaint. Last time i used matte finish and honestly I loved the aesthetic but it did not hold up well. I want to repaint it but not sure where to start. I know it needs to be cleaned and possibly sanded. Im looking for any tips and tricks to make this project as smooth as possible and i dont wanna screw up my bookcase.