Most first-time entrepreneurs, according to Othman Laraki (Director of Search and Geo teams at Twitter), think that there is a particular sequence that has to be followed. 

Here’s the typical progression: come up with an idea -> find a partner -> build a prototype -> launch -> raise money -> grow from there.

However, everything in the sequence is interdependent, and completion of one or more of the list items will help accelerate the other steps. You should not wait until one step is finished before moving on to the next one - there’s no particular order that has to be followed. You can and should do them out of order. Do what you can at the current moment and set up a bunch of parallel processes that all the steps are moving.

This ensures movement with speed. Whatever you finish first will accelerate the others and increase your overall chance of success.