No it won’t. You have more chances to have a plant real close to the mother because you narrowed so much the genepool with the selfing. Won’t be clones though.
Consider also that by selfing you’d lock yourself in fem only, while by using males you can continue the line in reg and fem as you wish later on.
But that’s not your plan 
There are other way to do what you want:
You can flower males and females together, cut branches of the male(s) you choose just before they start dropping pollen and toss the rest. Put the branches in a glass of water near a window (and under something to prevent pollen to fly). They’ll go on dropping pollen you will be able to collect. Put a sheet of parchment paper under the glass to collect the pollen. Usually males bloom before females, you have time to collect the pollen before the females are ready to get seeded.
There’s also the males-in-a-bag method documented here:
By using one of this technique you can flower everything at once, so faster partially seeded sensi harvest if you’re careful enough.