I was into movies int he past, but BH left it.; I am into arts and crafts. can i make sometimes some arts and crafts relating to those movies (nothing immodest) to fill in a bit on the nostalgia?

No, it is absolutely forbidden to make arts and crafts related to immodest movies, even out of nostalgia. This is a serious problem for several reasons. First, anything connected to immodesty is completely forbidden for Klal Yisrael to be involved with in any way, shape, or form. Whether it's immodest dolls, immodest clothes, immodest movies, or immodest shows - if it has immodesty, it's forbidden. This extends to creating art or crafts based on these things as well. Second, you're not even allowed to remind yourself of your past sins. The Torah forbids us from reminding ourselves, "Oh, I used to do this sin, I used to do that sin," unless it's to help people by telling your teshuva story. But just to revisit your sinful past for nostalgia? That's completely forbidden. You cannot bring those images and memories back into your life through arts and crafts. Third, when you do proper teshuva for watching inappropriate movies and having lustful thoughts, the most important thing is to make sure you don't fall back into it. You need to figure out what brought you to watch those movies in the first place and remove those factors from your life. Creating art about those movies is the exact opposite - it's inviting those sins right back into your home and your mind. Throw out anything connected to your past immodesty. Don't bring an abomination into your house. These things take your mind away from Hashem. Move forward with your teshuva and leave that garbage in the past where it belongs.