you can submit your paper to our journal right now. After you submit your paper, the editor, the managing editor and/or the editorial team decide whether to consider the paper for review or not. Ideally editors will notify authors of such a decision within a couple of weeks so that the author can find a more suitable venue for the piece without losing too much time. Assuming that the journal staff decides to consider the paper, its next task is to find reviewers for it. The process of finding enough suitable reviewers who agree to the task itself can take a while. If you notice after about two weeks that your paper has not yet been assigned for review, then consider sending an inquiry to the journal to check about the paper's status and whether there is anything you can do to help it along. After a certain period of time, in my areas about three months, if the journal still has not responded with a decision about the manuscript, it is O.K. to send the editor or managing editor a short polite note to inquire about the paper's status.
The most common responses to a submission are either a request to revise and resubmit the piece or a rejection. Outright acceptance and acceptance conditional on minor revisions are also possibilities, but are rather rare.