dont worry it ok
firstly do you know what supplier your college uses for their course, the reason being it is sometimes easier to practice using their system then changing from one to another. you should get a kit with your college course, i know i did and i used that to start with.
one thing i will advise do not go out and try to purchase everything in sight that looks good, very expensive and you may not use it again.
once you have qualified you will be able to do other training with suppliers such as creative, ez flow, etc and once you have done this you will be able to purchase their products.
you said you did a 2 day course what company did you do this with and i assume you got a kit with that, practice with that and if you have run out go back to them and purchase some more,
we all try and help each other out on here with all sorts from advice on nail products etc to morale to hair die colours (right kimmie - have you gone red yet !!!)
dont be afraid to ask anything, the more you ask the more you know, knowledge is a great thing
take care