I went to injection training on my own, as DH was at work (though could have come along) and he really doen't like needles/injections/blood tests!
My nurse was great, she went through everything slowly and a couple of times, then I had to too, before putting an empty syring in my stomach! In my drug bag were additional instructions with illustrations to refer too if need be. My nurse said that if I find myself asking a question and being unsure of the answer, then I was to ring them, as it's not my job to make decisions.
What size are your needles? mine are 12.7mm long and .33mm thick. 29 Guage.
Did my first Puregon injection last night - which is administered with a pen (though the needle is the same size as the syringes). I held it like I was stabbing myself, and found it easier to use my left hand to push it in, as it rotates as opposed to going straight down ifkwim!