There are plenty of people who shit on genre fiction (namely, sci fi and fantasy) not being "real writing" because it doesn't focus on characters, it's only PLOT focused or OOO LOOK AT THIS COOL THING. But literary fiction can be just as dull and boring, mind you!
The speculative parts of speculative fiction, ultimately, reflect humans of the here and now. We write about our fears and concerns of the modern age or examine injustices through a fantastical lens. Dune, the "greatest" "science fiction" novel of all time (it's not, it's fantasy lol) is just "oh no those weird Muslims in the desert control all the oil!" but in space and with worms.
Walk into your friendly local neighborhood bookstore (or library, if money is tight) and ask someone working there for a recommendation of a sci fi book with great/strong characters. You will get PLENTY of recommendations, take those books home and read them.