Good on you. The other thing I'd say is give yourself little steps. Such as you're off to speak to someone from the uni in a few weeks, make it your aim to not self harm before then, and to have a think about what you actually want to tell them. Make a promise to yourself that you'll be completely honest with them. Then break that down further. Todays aim, to not self harm today, tomorrow, extend it another day. If one day you do self-harm, deal with it, clean it up, look after it (will reduce scarring) and then move on...start the day mentally again, and try not to self harm for the day again. When youve managed a week, (note the word when...I know you can do this!) move on to trying for two to three days, then later on a week. Also try and build some you-time into your schedule. Time to go for some exercise, get out of the house, and generally make yourself feel good.
Many people will be able to understand what you've been through, myself included. I used to self harm, I class myself as an ex-self harmer and tell people I havent self harmed for three years. In truth I have self-harmed twice since, one mildly, one while drunk, and in my head both mean nothing. Its like they say about diets, dont throw it out of the window if you make one little mistake.
And about scars, you're best off trying to learn to love them. I've bought everything and anything, including some dodgy palmers scar serum, vitamin e cream, those boots own gel pads, and cocoa butter. All useless, the only thing thats helped is time, a) for them to fade, and b) for me to learn to get on with them.