Problem related to bidding on a job request

Problem related to bidding on a job request

Hi everyone!
I've recently joined this freelance website so I don't have much knowledge about this platform. Today, I found a "job" section and tried to bid on various job requests but I'm unable to bid on any of them. In some cases, it says that the bidding has been closed while at other times, it says that my level is below the minimum required level for this job. Can anyone please tell me that how to determine on which job request I can bid as I can't find any such requirement section on any of the job requests? Thanks in advance.