Once you are done with medical nd got the result, you will have to fill in the application online (or some will do it for you, It will be in Arabic: www.moi.gov.qa) take the copy and directly go to finger printing department. For filling the form you need to know your Visa number and sponsors ID.

Once your finger printing is done, the sponsor, PRO/ Mandoop will take care of stamping visa n ur PP and getting an ID for you.