Responsive mobile,tablet and desktop made using mostly grid and flex

This is my first challange of this website, i recently finished html/css and js course and now started making my stuff without watching anyone making it for me.Any tips on this preview card i could've done better, how could've i write this code easier and faster maybe? Thanks for any tips

Btw i had no idea if anywhere was written how big in width and height should this be haha.