Hello @Mahesh Chahareโ ,
The "Waiting to run" message appears usually when the cluster start or library installation is in progress.
If you are running the commands on an interactive notebook, and you have clicked on "Run All", the commands will get executed sequentially. (Only one command will be running, others will be in the Waiting to run status)
From your comment I understand, you want to run a job and a job cluster should automatically get attached to the job and run, you may use the job scheduler for the notebook.
Please refer to https://docs.databricks.com/workflows/jobs/jobs.html
Hope this helps.
Thanks & Regards,
Nandini