It could be a number of things:
if you don't know how to tack up a horse, or even halter a horse, and you admit that you aren't comfortable around horses, I'd bet that your trainer sees that and doesn't feel like you are able to move on yet. I'm slightly confused if these are your first riding lessons, OR if you know how to ride very well and these are your first JUMPING lessons. IFFFF and ONLY IF they are jumping lessons, you should be doing more than trotting over ground poles in 6 months' time. BUT if you are a new rider and have only been riding for 6 months, total, ever, then you should worry less about jumping and more about flat work. I know it isn't the "fun" stuff, (tho honestly I loovveee flat work as much as jumping) but it sets a good foundation.
However, for arguments sake, lets say your trainer really doesn't care much about her students and is truly NOT teaching you properly: If you can't go to another barn entirely, can you get a different trainer at THIS barn? There is no shame in changing trainers. I rode at a barn years ago for about 2 years and in that time I had 4 different trainers before I found one that worked for AND WITH me. (I don't ride there any more tho). Maybe see if someone else out there can give you lessons.
It is very important to first feel secure and confident around a horse. I suspect that if you don't know how to take care of a horse (generically, like tacking up and haltering) that maybe your trainer isn't really doing you any good. always learn the basics first before trying to learn anything else.
~He knows when you're happy
~He knows when you're comfortable
~And he always knows when you have carrots.