Maybe try a ZIA (zentangle inspired art) piece, but not sure how to begin?
I find a good way to get a feel for drawing tangle patterns a little larger is to start with a simple circle template. You should be able to find lot of things to use around your house (plastic tub lid, bowl, large candle, etc.), just have a look around and you will find lots of different size circles. In order to get the feel of working larger than a tile, your template needs to measure larger than 3 1/2 inches in diameter. In light pencil, trace around your circle template, and draw a simple string that divides your circle into 2-4 sections. You can use the edge of your template for creating your string. Pick out some tangles and practice making them bigger. If you use grid patterns, remember to make the grid bigger to start with.
The following circles are 5 3/4 in diameter and you can fit 2 of them on the same page of a 9X12 sketchbook.
When you start drawing patterns bigger, remember to practice, practice, practice. Just like beginning zentangle tiles for the first time, it takes awhile to get the feel for making tangles larger than what you are used to.
If you like drawing tangle patterns larger, next time use a bigger circle, or use a 5X7 size paper, make a border and a string and tangle making your tangles larger. Then gradually work up to a 8X10 and beyond.
Note: Some tanglers like to draw tangle patterns the same size they use on tiles, even in their larger ZIA pieces, and that is beautiful too! There is no right or wrong in the Zentangle method of art, it's your art and you can create it in whatever feels right for your hand.
Breathe, Relax, Smile, and have Fun!