In Jordan river
Some of Jesus' disciples were baptised by John Baptist in the river Jordan, and the others were baptised by the earlier disciples, probably also in the Jordan river.
At the time of Jesus Palestine was a desert area, so there was water in abundance in the river Jordan and river Galilee. So most of the people fished in the river Galilee , including the disciples.
It is doubtful that Jesus baptised disciples personally, although the New Testament points to disciples of Jesus baptising, likely under His supervision. It is also unclear whether anyone baptised by his disciples became disciples themselves. Remember that Jesus had many more disciples in addition to the Twelve who were later promoted to Apostles. A number of Jesus' disciples were originally disciples of his cousin John, the Baptiser, and were almost undoubtedly baptised by John.
Those who were baptized by Jesus' disciples during Jesus' earthly ministry and who therefore also became Jesus' disciples were baptized in symbol of repentance in the manner of John's baptism. Therefore baptism is complete immersion or submersion in water, not a mere pouring or sprinkling. The Bible examples of baptism corroborate this fact. Jesus was baptized in a sizable river, the Jordan, and after being baptized he came "up out of the water." (Mark 1:10; Matthew 3:13, 16)
Jesus during his ministry life on earth traveled over Judea as well as Galilee, it was while he was passing the river side he called his first disciples Peter, Andrew, James and John the sons of Zebedee.
IN THE year 29 C.E., Jesus was baptized, being immersed by John the Baptizer in the Jordan River. Jehovah himself was watching and expressed approval. (Matthew 3:16, 17) Jesus thus set a pattern that all of his disciples would follow. Three and a half years later, Jesus gave these instructions to his disciples: "All authority has been given me in heaven and on the earth. Go therefore and make disciples of people of all the nations, baptizing them in the name of the Father and of the Son and of the holy spirit." (Matthew 28:18, 19)
Saint John was called by Jesus while he was fishing with his brother, Saint James, on the Sea of Galilee. Jesus called out to them and they immediately left their fishing boats and followed Him, becoming two of His twelve apostles.
John 1:40 tells us that Jesus was near the Jordan River where John the Baptist was baptizing when He (Jesus) first met Peter. Later after turning the water into wine at Cana of Galilee, Jesus, His mother, His brothers, and His disciples went to Capernaum by the Sea of Galilee.
Jesus walked.
The main lake and river at Jesus time was the river Jordan and the Galalee.
Two were named Simon - Simon Peter, and Simon the Zealot.