Here "this hour" refers to Jesus' time of suffering, both now in the garden and later. AT: "that he would not have to go through this time of suffering" (See: [[rc://en/ta/man/translate/figs-explicit]])
"Abba" is a Greek term used by children to address their father. It implies a close relationship. Since it is followed by "Father," it is best to keep the Greek term "Abba" as is in your language. (See: [[rc://en/ta/man/translate/translate-transliterate]])
Jesus is asking God to do what he wants to be done and not what Jesus wants. AT: "But do not do what I want, do what you want" (See: [[rc://en/ta/man/translate/figs-ellipsis]])