I'm not getting that laptop in the end

I changed my mind and cancelled the order. I wanted to get a SSD because they read much faster but I'm reading that a lot of people upgrade or refurbish their laptops on their own by buying the new components separately and installing them. I don't even know how I would do that since I'm afraid of blotching the laptop if I open it, but I guess I wouldn't need to change any component in the first couple of years, anyway.
My current laptop is just SO slow and I'm so frustrated!!

I've been bearing with it for 2-3 years now, since it started working funny. I've had to format it twice and to get it cleaned inside twice too. Right now I'm not even writing on it, since it's so in agony that it won't start up. Lol, the BTS promo has been released in the nick of time XD Now I want something real fast, but maybe HDD will do for the time being, until I have the need to upgrade. I read a lot from my filed data and use many simultaneous applications.
I can't place a new order on the Apple Store for a few days because I have to wait for them to unblock my money, but I reckon I will be able to do it on Monday/Tuesday

That way I'll have more time to think, lol. Is it worth it to get the 8GB RAM?? I'm reconsidering that as well but I think I'll still stick to that
BTW, I'm thinking about getting the Magic Mouse. I've noticed that it gets a student discount. I was at a store the other day and the MM was a lot more expensive

But from what I gather, the Mobee Magic Charger is not that great, though. I'd get the regular charger.