I was a fill in letter carrier earlier in my retirement. I went through all the letter carrier training. What a nightmare of a job but that's another story. lol
Yes you can do a temporary mail forward for less than 6 months HOWEVER you cannot establish a physical delivery address for less than 6 months, I know it is crazy but we are talking about the government. To do it legitimately you have to set up a PO box and pay a six month rental. ASK the post master where you live for the straight scoop don't listen to "experts" on the internet. The previous post with a link to USPS dot com is only half the story the temporary forward. It doesn't mention a temporary delivery!
