Am I sinful, from a Sharia perspective, for not visiting my relatives (maternal aunts, maternal uncles, paternal aunts, paternal uncles) due to being affected by my psychologically ill mother, and is it better to wait until I get married to start visiting them?

Maintaining kinship ties is obligatory for married women and others. The nature of these ties varies depending on circumstances; it can be through visits, phone calls, messages, financial support for the poor, or gifts on occasions. There is no objection to visiting relatives without the husband, provided Islamic guidelines are adhered to.