“6 When they therefore had come together, they asked of Him, saying,
“Lord, wilt Thou at this time restore again the kingdom to Israel?”
7 And He said unto them,
“It is not for you to know the times or the seasons which the Father hath put in His own power.
8 But ye shall receive power after the Holy Spirit is come upon you;
and ye shall be witnesses unto Me both in Jerusalem,
and in all Judea and in Samaria, and unto the uttermost part of the earth.””
(Acts 1:6-8 KJ21)
It is not because Jesus was going to send a Helper, that they had nothing to do. The opposite this Helper would make work light for them. They would get an attitude of willingness to follow up that what Jesus asked from them.
In Acts 1 we see that the disciples were hoping the kingdom would be established right then (verse 6); but no, they were to be witnesses, beginning “in Jerusalem … to the end of the earth” (verse 8).