I got Minecraft just yesterday and I have tried uploading a skin following every possible guide. While looking in the skin library, I see the skin is there and it says that i have selected it but when i run the game and play I am Steve and I can't even change to Alex. I also scanned for malware that could be interfering with Minecraft but such is nowhere to be found.
This report is a duplicate of MC-101579, which was later resolved as invalid. The reason for this is because this issue is most likely caused by malware or other software that is interfering with Minecraft. Please see the Moderator Note attached to the parent ticket to potentially fix this issue.