Was Christ a man like us?

Yes, except sin. All Adam’s descendants (all men, women and children alive at this time) have a sinful nature (Romans 5). But the Lord Jesus had no such sin nature. He was “tempted in all points like as we are, yet without sin” (Hebrews 4:15). Let us note carefully the following:

Christ committed no sinful action: “Who did no sin” (1. Peter 2:22).
He knew no sin: “Who knew no sin” (2 Corinthians 5:21).
In Him there was no sin (i.e., a sinful nature); therefore, He could not sin (1 John 3:5, compare with v. 9).