I'm going with a yes you can make a king size quilt. A good size for a cal king bed is about 100x110 it gives you plenty to hang over the edge of the bed it will overwhelm the queen bed.
Get some graph paper and draw out what you want to do to scale. That will be the finished size of all your pieces. Remember when you cut those pieces out you need to add 1/2 in inch all the way around If you want an 8" finished block you need to cut it at 8.5 inches. If you want a 2" strip it needs to be cut at 2.5 As a beginner stay with straight edges and away from biased cuts they stretch too easily and difficult to match your seams. Once you draw it and and get your cut sizes you can figure out the yardage you need.
If you really want to do this you can but it will take time and it is not cheap. After your top is done do you want it quilted? The actual quilting is not something I would advise a beginner to do and it is expensive to have something that size quilted minimum of $150.00 probably more for a very basic all over quilting. And do not forget to factor in the cost of the quilt fabric, the batting and the cost of the quilt back. To save some money you can put it together with the birthing method the tie it.
Still want to do it? Go for it just start soon and don't rush it.