Digital Graphic Art Learning Curve

They say you can't teach an old dog new tricks.  If I followed that rule, I'd be done for.  I'm still trying to get the software & hardware that I'd like, & also a take a course to see if I can get some pointers.  But my rule is, if you don't try you'll never learn.  So, here is my 1st attempts at producing an image using digital mediums.

I've used the "Peeled Heart", one of my older tattoo designs.  This basically means it's hand drawn, then scanned in.  The rest of the work is done post scan.

The bottom image is very "Pop-Art", but fits well with the tattoo style of design that I have been used to drawing.

It seems a steep learning curve at the moment but I'll get there.