You need to use 'half-asleep' because you can't agree to something while asleep. Perhaps you could agree 'in your sleep', i.e. you were talking in your sleep. But you wouldn't be aware that you had done that I can't see the word 'change' in your text so I don't know what you would like to be changed.

I'd like to know about alternative word about agree like can I use jump right on the plan instead of using 'agre

Alternatives to "agree" Some ways you can express your agreement with some plan or suggestion: "I'm down with that." "I can get behind that play/idea/approach..." "I concur." "I'm on board." "That works for me." "Where do I sign up?" (implying you want to be part of the effort so must be agreeing) Seemed like there should be more so I did a quick Google: https://englishstudyonline.org/ways-to-say-i-agree/ https://yourenglishvocabulary.com/7-ways-to-say-i-agree-in-english/