I need some new anime to watch

Rent a Girlfriend - lonely recently dumped guy rents a girl friend but a comedy of errors force them to keep up the pretence that they are actually dating for a prolonged period of time.

No game no life - nerdy siblings who stay in all day playing games are transported to an alternate dimension where all conflicts including international politics must be resolved by playing games.

Domestic Girlfriend - High schooler has one nigh stand with random girl he meets only to find out she is becoming his new step sister. 

Saga of Tanya the Evil - nihilistic atheist is punished by a supernatural being by being reincarnated as a baby girl with magical powers in a world where a world war is about start and told if she dies she won't be reincarnated again. 

Miss Kobayashi's dragon maid - hard working woman with a maid fetish saves a dragon in the woods who insists on moving in with her as her new maid.

GTO the animation - violent and sleazy former leader of a biker gang become a teacher and inexplicably finds he's good at rehabilitating troubled youths.

Gundam wing - in the future there is a coup on earth and humans in space split away from earth. Scientists send 5 boys with super human reaction to earth with giant robots to wage a secret war against the new regime.

Zombie land saga - a group of girls become zombies and are immediately forced to form a pop group.

Dr stone - all humanity is turned to stone by a strange green flash till one day a nerdy student breaks out of his stone shell and swears to restore humanity and society with the power of science.

Kiznaiver - a group of young people become linked at the behest of a shadowy group so that they start to feel each others sensations and strong feelings.

Citrus - newly introduced step sisters with polar opposite personalities must navigate their unexpected attraction for each other.

Love, chunibyo and other delusions - girl with troubled past who is convinced she has magical powers and lives in a fantasy world makes unexpected friends.

darling in the franxx - in the future children are raised to fight monsters in girl boy pairs using giant robots. A boy who can't form a stable pairing suddenly finds he can with a inhuman girl with a reputation for getting her partners injured.

Is it wrong to pick up girls in a dungeon? - mythical figures give humans magical powers and send them to fight monsters in the dungeon. Hestia has only one fighter and unbeknownst to him she is in love with him.

91 days - a boys family is killed by the mafia and he spends the rest of his life plotting a revenge on the mafia from the inside.

Megalobox - an obscure competitor in unlicensed cyberboxing fights takes his shot at becoming a champion in the licensed fight world.

Mobile Suit Gundam: Iron-Blooded Orphans - Cyberneticly modified orphans forced to work as disposable labour on mars are forced by circumstances to become a rebel force fighting for mars's independence from earth.

Science Fell in Love, So I Tried to Prove it - 2 nerdy research students fall in love and trie to prove the existence of love scientifically to justify their feelings.

The Ancient Magus' Bride - troubled girl unable to control her magic power sells her self as a slave and is bought by a kind but inhuman mage to be trained as his apprentice.

Fire Force - in the future sometimes people spontaneously become fire creating monsters called infernals. The fire force is charged with defeating such monsters and protecting the city from them.

JOKER GAME - in the run up to the 2nd world war japan forms an unorthodox spy agency to give it an edge.

Keijo!!!!!!!! - girl enters the highly competitive world of keijo. a pro sport where girls attempt to push each other off a platform using only their bust, buttocks and hips.

Bodacious Space Pirates - school girl inherits one of the last letters of mark enabling her to become one of the last licensed space pirates.

that's just some of the stuff i've seen that you should be able to stream online for free.

Incidentally in case anyone’s interested the two main protagonists in no game no life are canonically autistic 

Incidentally in case anyone’s interested the two main protagonists in no game no life are canonically autistic