What types of things are you into? One of the biggest ways I regress is to try to fuel my passions/inner child. For example, me and my sister often watch children's cartoons. Another way would be through art. Try scribbling! Drawing artwork without serious intentions! Either way, find things that you like to do, and immerse yourself. Allow yourself to relive your youth, without judgement or fear, even if it is in solitude. You have to find what suits you best. If your inner child is wounded, or hurt, seek out new interests. (As for the family situation, try to find subtle ways to regress. Whether it be clothing, mannerisms, etc.)