If you want to do more PCB designs I would suggest download Eagle and get used to it, because Protel is really expensive and the trial version just lasts 30 days. Eagle has everything available in the free version except that the board size is limited to a certain size, but that is big enough for most circuits, and u can always make multiple boards.
Protel although is definitely better. And has a lot of features and is also easier to learn. But still if it takes 3-4 days to learn Protel, it will take you 1 week to learn Eagle.