Welcome to the wonderful world of carving! As a new carver , you have the whole world in front of you. Lots of great styles and woods to experiment with and new tools to buy! Leaves are a great exercise, both in a relief carving or carving in the round, with so many species to try. Have fun with it and the learning curve.
As for tools, Rick Ferry (Rick from Seattle)(
www.Littleshavers.com ) sells a nice beginners set at a very reasonable price and most importantly, they come sharp as a razor, and include a strop to keep them that way. If you can, try some different shaped handles before you purchase any large amounts of tools, to see what shape fits you the best: plam, short, European or full length.
Bob