Why does my head not retain information? Am I draining my emotions and feelings?

Whenever I learn something whether at school or my religion, I feel excited and eager to learn but as soon as it’s over and depart, my brain thinks about what happened then goes to different subjects and what I learned fades away slowly until I don’t think about it anymore. I want it to stick, to stay, to retain them but they don’t always until I recall certain facts and information. It’s hard for me. It used to be a bit easier but even then it would disappear. I’m nothing. I feel so empty and emotionless numb. All my thoughts, feelings, and emotions were drained out of me somehow and just disappeared. I don’t do the same things I did when I was younger anymore. It’s pretty bad. Some things I enjoyed, I barely touch.

I perform so many tasks at my house (not my house but my parents’ house) and have siblings all younger than me. Imagine a huge family but you barely get time for yourself. You have to take care of so many people at the same time, their needs, etc. It’s like one cannot do it alone. Imagine a family but everyone has a device—we’re being disconnected from each other and forgetting to communicate with one another.
The pandemic has its pros and major cons.

This pandemic saved our Earth in a way. It cleaned itself. No more pollution for a while until businesses opened again. People cared less about their homes and littered. Things dried up. Things froze. Things aren’t the same anymore and we’re online. I have so many tasks and haven’t done one single one, too many but don’t get it done. I have so many ideas but they don’t get planned to action. See? I’m useless.

I want to do something, help, but I’m the worst human being ever.