did you do your training at college?
were you trained in different systems?
do you know the brand of product you have used? (i looked on your profile and it didnt say anything)
it maybe that you would need a workshop style class taylored to your needs
most companies and brands like EzFlow (who I educate for) will offer something like this I'm sure
When you first start out nails isnt easy, even if your tutor/educator makes it look like it is, there are lots of factors which need to be practised and learned (the right way) how to get to grips with all the techniques needed to do nails, it is a lot to take in and you shouldnt worry if your nails are not perfect to start with (you will keep learning and growing the more training and practicing you do) Almost everyone will be with me on as we all started somewhere
I think its good that you are thinking of trying to improve your self, maybe speak to your tutor/ educator if you can too as im sure that will be able to give you some additional advice too
Jess x