Yep, I'm another one who used to have pinky trouble. It takes time to get complete control, but you get there in the end
Best thing I found was to just concentrate on it - stretch before playing and play scales or chromatics using
every finger.
Also, seeing as though you're only new to playing, here's some advice that should help you (I still suffer from this). When you're playing with any of your fingers, try not to let your other fingers wave / spaz about - keep them close to the strings, on the fretboard... that'll give you more control in the long run and make the frets more accessible to the strings.
Another quick note too - keep your arm and wrist straight! This really does matter and helps your fingering technique no end. It stops stress on your arm and wrist and gives you more fludity with your fret movement.
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Hind-D R: Ampeg SVT-4 PRO, 810HPC
B: Yamaha TRB6JP2, Ibanez BTB 556MP, Fender Deluxe Jazz
E: EBS MultiComp, Boss MT2, Line6 Echo Park
Clubs
Yamaha #158 | Fender Jazz #115 | Ampeg #379