I went through the same recently. Became interested on too many different things, projects and topics because in my mind there was so much going on. Get enough

I went through the same recently. Became interested on too many different things, projects and topics because in my mind there was so much going on. Get enough good sleep. If you don't sleep enough you won't be able to focus and retain anything you learned long-term. Don't put on headphones or fall asleep listening to videos/podcasts or looking at things on your phone. Create a setting in which you can do 1 thing uninterrupted. If there are any potential distractions, put them away, turn them off or close as needed to create necessary boundaries. As we grow older we accumulate and we obtain more things that we could make use of but have effectively the same or less time to devote to each individually.