The core reason to not buy a T9 clear is that if you're going to go into T10 you're going to want the experience and lessons T9 taught you. While the difficulties are different, learning to do your job while simultaneously doing all these other things is going to be absolutely essential going into T10+.

A T9 clear is not going to come immediately, or easily. It took me about a month of jumping into PF groups to learn and reach the skill point to start seeing the exit - and another month to find a group that could actually follow through and didn't immediately disperse because someone decided to make this group right before their static met up or some other nonsense.

You don't have to become a raid leader, but you may have to start taking the initiative to build these parties on your own. If you're not going to take the initiative yourself, then your speed is going to be at the behest of others, and there's no magic solution for that.