First you send us your passport and the desired dates of the trip, we advise you free of charge about the possibility of receiving an invitation, what chances, terms, risks.
After we start the process of registration, if your citizenship allows you to receive an electronic invitation - then you can go to the Consulate on any given day.
If your country requires the original - we send it by courier service (1-2 days)
Next, you expect a passport
And welcome to Russia :)