nursery or kindergarten or what?

assalamu alaikum everybody. i'm a mother of 2 boys. my eldest is 4yrs old. we just came back from my country for a short vacation. just want to ask for help (and opinions too) about him in a school now. i'm quite confused whether nurseries here in doha accept 4yr olds or he is more into the category of kindergartens? for you kind readers you might also want to share with me some good nurseries/kindergartens/schools for my boy that i can check out? i want him to go to school now as i think it's too much now that he is just staying at home with me and his baby brother. he has gone to a nursery last year in al khor while we were still there, but only for 3mos he went. i hope that you can help me out. thank you all so much.