Macbook Accessories

I am a new student and can afford other stuff and accomodation however I have no computer. Neither desktop nor Laptop. It is really depressing me and so therefore rather than get an awful and upsetting 400 pund starter laptop I thought just invest in the Macbook Pro.

I would however need to buy this on a credit card. Therefore I have done this

http://www.moneysupermarket.com/cards/results.aspx?cardEnquiryId=2679425

If I got the 0 per cent for 12 or 9 months on purchases does that just mean I do not pay interest up until those months have expired but I still pay for the MacBook or I pay nothing until 9 or 12 months and not even money towards payment off of the Macbook Pro.

I would buy it on one of the above credit cards and not the extortionate Apple Finance plan credit card rate. Am I doing the right think? Help mme understand my queries. Cheers