First, welcome to the forum!
Secondly, you need to go to the Play Store app and look for Adobe Flash in there to install it.
Also, we have some guides to help new Droids get the most out of their tablet here:
The Master Help Guide
Have a read through those links and such and you will have a better understanding of where you are.
Also, I moved this thread to the TF300 Help section to help others find it and help you if with their suggestions on using the TF300.