Euro archives confirms Noaks Ark generations.. 4 min watch, page-2

Shem lived 500 years after fathering Arpachshad, dying at the age of 600 years. (Ge 11:10, 11) His death thus occurred some 13 years after the death of Sarah (1881 B.C.E.) and ten years after the marriage of Isaac and Rebekah (1878 B.C.E.). In view of this, it has been suggested that Shem may have been Melchizedek (meaning “King of Righteousness”), the king-priest to whom Abraham paid tithes. (Ge 14:18-20) The Bible record does not say this, however, and the apostle Paul shows that no available genealogical record or other vital statistics were left concerning Melchizedek, so that he became an apt type of Christ Jesus, who is King-Priest perpetually.—Heb 7:1-3.

https://wol.jw.org/en/wol/d/r1/lp-e/1200003997

As Abraham was of the same family line it is logical to assume Shem would have taught Abraham and contributed to his becoming a man of great
faith.

(Romans 4:11) And he received a sign—namely, circumcision—as a seal of the righteousness by the faith he had while in his uncircumcised state, so that he might be the father of all those having faith while uncircumcised, in order for righteousness to be counted to them;