Hello and welcome to the board! You don't say which country you're in, but I would go to the local library and get a couple of books out. Also, some quilting magazines have basic instructions on how to quilt.
Can you sew already? (I couldn't thread a machine before I learned to quilt!) If so, quilting uses 1/4" seams unlike dressmaking. ALWAYS cut away from you and remember to keep your fingers away from the edge of the ruler!
Jenny Doan of Missouri Star -
here - has a lovely relaxed way with tutorials which involve the use of pre-cuts which may be a good introduction.
Happy quilting! (WARNING - it's addictive!)