start

the time to start is now.
stop thinking about wanting to be a painter, sculptor, photographer, writer, poet whatever.
thinking gets you nowhere.
do it.
start now.
don't worry about the quality, don't worry about the quantity. just do something. get it started, feel good about being creative and let the rest worry about itself.
you'll have enough time to worry about whether or not it is any good once you have done it - and that is the time to start worrying about it - not before.

so get on with it.