I don't know very much about the lower level equipment because it wasn't available to me at the time, but I would like to offer one piece of advice that might be helpful.
New equipment requires a step backward before you can move forward. It takes time to learn new clubs and to be able to really get the most out of them.
Regardless of what you choose to buy, stick with it for a while. Many players change their clubs frequently in the hopes of filling some perceived gap in their game, but they never stick with them long enough to let their game adapt to the new clubs.
The free rental weekend will give you a chance to try everything that's available to you, but at the lower levels, it won't make a huge difference. I would stick with the tour starter set and learn the courses until you can get to some quality clubs r11s at 32 or k15s at 36 are both good sets, and you'll be at those levels sooner than you think.