As general rule - 1 finger per fret.
that has the first 4 frets covered.
If your little finger is on the 4th fret, you should be able to move your hand so your index finger is on the 5 fret without looking, then you have postions 5, 6, 7, and 8 covered.
Adjust for what key or position you start on.
I tend to find looking at the fretboard gets in the way of throwing shapes and posing
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