E-TTL vs TTL Wireless triggers

Hey guys. Thank you so much for the replies, sharing your own expariences and knowladge.

I geuss i wanted teh radio trigger for when i decide to go outdoors to experiment with, learn and develop those outdoor skills.

At the moment i cant afford proper studio lights so just using the one speedlight flash, umbrella and reflctor are what im using at the moment. In the future i will be looking at getting some better "studio" specific equipment and i thank you for pointing me in the right direction of Adorama's and others gear.

Another question i was thinking about is: Is it NESSECCARY to have a bought backdrop? Some form of cloth? Or can one use a painted wall at home, or something else (black sheet etc)

Again, thanks for all the help, its invaluable to me:)