I would really appreciate it if someone could tell me anything about this military uniform. Thanks so much for any help!
It seems to be Polish.
This drawing I found shows a uniform that has more accessories, and this may lead to confusion. I assume your photo pictures a young private with low or no grades.
Another picture of a Polish soldier clearly shows similar numbers on the collar: https://ar.pinterest.com/pin/510173464030294530/?nic=1