Please read our well formed documentation.
Yes, it is mandatory to register before submit a research paper.
After submit a paper, it goes to some procedure. It may take 5-7 working days. It may increase 10 days.
After accepting you submitted paper, you may pay your article processing charge (APC)
After receiving your paper, Finished all procedure, We try to publish the first week of every month. But if you submit your paper last date of submission most probably it may publish the next issue. Because we have maintained paper acceptance procedure and it may take 5-7 days. But we try to publish in the current issue. When your paper will publish, you will be notified via mail.
After publishing your paper, you will get your paper access key in submission list in your dashboard. But till now it's used is not available. It is in the next plan to protect your paper information.