all the major exchanges are not accepting new registrations where can i register?
There is an increased number of registrations on tge exchanges lately so, some major exchanges like bittrex closed the registration for creating new accounts so, i think you can still register on poloniex but you have use your id and your face for identity verification and also you can register on cryptopia but it's not mobile friendly so, you may only it on PC.
You may register on binance they are accepting already new members. There are many exchanges worth joining today also like kucoin you can try this site. Also watchout to register on this best exchange bittrex and poloniex.