^Yes you can!! Find the partitioning tool under YaST.
For all your partitioning needs GParted Live CD is the best. Its easy and very intuitive.
There will be no problem.
Hope you dont go on distro hopping as i have done. Most of them are similar and are not radically different. Popular distros like Ubuntu or its derivatives, openSUSE, Mandriva, Fedora,etc., are all nearly as good as the other. Just pick 2 of them and start learning Linux.