For me, the whole basis of crochet is making chains, the other types of stitches are like making chains, that is, they are made with the same movement of the hand, so once you get used to said movement, everything is possible, the other stitches Like double crochet, decreases and increases will become easy once you have mastered how to make a chain. keep practicing, with different sizes of needle and thread and you will find out for yourself what works for each project 😊