Ways I (not really but maybe a bit) Cheated With My First Quilt:
I used my DD’s old baby clothes to make a quilt for her.
All my bits of fabric were odd shapes and sizes, and I had a mix of stretchy, stable, thin, thick, you name it.
First thing I did was buy a shedload of iron-on interfacing, and I interfaced every single bit of fabric so they all lay flat and held their shape.
Then I cut my shapes. I stuck to squares and rectangles.
I sewed them on my machine, in sections, then sewed the sections together.
I used an old cotbed-sized duvet for the wadding, and a brushed cotton sheet for the backing.
I didn’t quilt the top, wadding and backing together, I tied them (google tied quilts). This is way quicker and I like the slightly rustic effect.
I didn’t make and attach a separate border. I used the backing, and folded it over the wadding and the top to make the backing.
And, vitally, I made it just the right size to fit in my washing machine 
The interfacing doesn’t affect the ‘flop’ of the quilt at all, and it means that none of the stretchy fabrics have gone billowy or misshapen.
I recommend starting with something small and simple. They take longer than you think, and you don’t want to run out of steam, especially with your first one.
Good luck, I love (my haphazard approach to) quilting!