I've tried many methods of QAYG. I like 2 methods.
Join the entire quilt face.
Have the backing material.
Cut batting to the small area you want to quilt.
Roll up all the excess top and backing and quilt your area.
Unroll, decide on your next area, add batting, roll up all quilted and unquilted areas and quilt your area.
That's the basic idea, but look at videos to see how it works and if you want to incorporate different things like batting tape.
I also like making each block.
Put batting on each block and quilt independently.
Join blocks.
Add backing and join backing to quilt. This can be done with very rudimentary patterns just to join the sections, your quilting is already done.
Again, look it up, YouTube it. There's so many techniques, you just have to find those that speak to you