If it is a brand new bow then yes, you`ll need to rosinate it a lot. However, what type of bow did you buy? Did it come as a `set` or did you buy it seperately, because there are loads of different types of bow out there and they can all act differently. I think I heard once that chinese bows are really light and bouncy, unlike carbon-fibre bows. However, don`t quote me on that!
There may be someone else here who can help, I mean I`m only a beginner and I teach myself too, so I`d go with the word of someone older and wiser
Hope this helps anyway