its important that even if ur not going to school currently to continue learning and educating urself about the world in which u live. think of ur brain like a muscle that needs to be exercised everyday. or a plant that needs to be watered daily.
FOR LANGUAGE LEARNING ;
read subreddits and newspaper articles in ur target language everyday. that way u can learn about news in different countries while also practicing ur target language.
READ BOOKS ;
specifically nonfiction but nonfiction doesn't always have to be boring. read entertaining nonfiction. some fun topics to research books for include
stock market and economics
industry of ur choice (i like fashion)
SATISFY UR CURIOSITY ;
whatever ur curious about, RESEARCH. thats the funnest way to learn in my opinion. make a list of things that u are curious about or find interesting and when u have the time research them and educate urself about them.
write down what piques ur interest
STIMULATE UR MIND ;
daily mind stimulation is good for ur well being in general. read books fictional or nonfictional, do some writing, do word searches and puzzles etc. for funsies and to keep ur mind sharp.