Is this a boy I'm unsure

Hello!  Here is my guide to sexing kittens:   ¹)  if they are old enough to have testicles, it's usually a no brainer.  However before then, you can look at the two holes so carefully pictured here.   Males have an Anus (top hole, tight with a sphincter) and a round hole, a good distance (two finger widths, perhaps) below it.  This is the end of the penis,  which is sunk into the tissues around it and pointing backwards, so it just looks like a round hole.  Females,  by contrast,  also have an anus, with a small gap and then a slitty hole below it, very close, so that there is very little distance of skin between the two holes.  Some people say that females look like a bit like an upside down exclamation mark.   I'm afraid that we don't judge pictures on this site, but hopefully this will help.

If it is not cleat, it does occasionally happen that a kitten has abnormal anatomy and in these cases, they need to be shown to the vet who might have to do tests to find out more.