Are there some who see Jesus as Messiah, bit not as being very God, like a human only Messiah?Well, in my experience and background, a Messianic Jew is simply a Jewish person who believes that Jesus of Nazareth is the Messiah of Israel.
He is the fulfillment of the old testament prophecies from Genesis to Malachi.
Which is what non-Jewish Jesus followers believe.....
There may indeed be cultural practices which differ, but in general, it's that simple.
And those cultural practices which differ from gentile Jesus followers are the Hebrew biblical festivals, which are held every year.