Can you put the sperm fluid with your hands in your vaginal cavity on the ovulation day and still have chances of getting pregnant the reason is my husband is not ready so he ejects outside.?

Yes, you can. And while your husband is inside you, before he ejaculates, he could still be sending you some sperm in the lubricating 'pre-ejaculate'. Sperm won't live long outside the body, so you should do it immediately. If you are ready for children, but your husband is not, it might be better to talk to him more about it till you can agree on it.