I just started playing guitar, and I found out that after a while playing guitar, you eventually get a callus. It is really painful when I press my fingers onto the strings, so I really need a callus to stop the pain.
You have to press more on the strings…I know it can be painful, if you can, practice on a guitar with high action(the space between the string and the fretboard). Eventually, if you practice enough, you’ll get calluses. If you practice a lot, they should form within a week.
But for now, practice, until your fingers hurt, rub them so that the impressions of strings on your fingers disappear, and then practice some more. And don’t forget the pinky, don’t think you can get away playing guitar without using your 4th finger:)
Good luck, and if you have any more questions about learning guitar, you can email me.