Google anything you don't understand and go to several websites.
YouTube is your best friend to learn almost anything about quilting. Bonnie Hunter,
https://quiltville.com/index.html has some wonderful tutorials that can teach you a lot.
One of the most important things to me, is learn how to sew your seams so that the result is the size you want the finished project to be after you iron them. Practice this some before you commit to a large project.
https://www.thespruce.com/quarter-in...quilts-2821362
And, above all else, Have FUN!!!!
My friend, who isn't a sewer, has made 4 quilts. She used Layer Cakes (10" squares) and placed them pleasingly, sewed the pieces of one row together, then sewed the rows together and the results were good. Nesting seams in this type project is a must. Just wanted to mention, that steam can stretch fabric. I always use a dry iron when pressing. Pressing is lifting the iron up and down. Ironing is moving the iron across the fabric. PRESS seams.
There are many more tips, but you will learn these as you go. Welcome to quilting!