And you only have to know how to tie knots to make this one.

Gather the tree decorations. The more natural, the better! You can see I used pinecones, lavender, dried small peppers, cinnamon sticks, dried rosemary, and dehydrated orange slices. The orange slices took the longest. You can slice oranges, place them on a tray, and either dehydrate them in a dehydrator or in an oven on a very low setting. Gas ovens with a pilot light can dehydrate without any added heat. Other ovens need a low temperature. Anything higher than 175F will probably cook the oranges rather than dehydrate them. Cooking means the outside of the orange will get hard before the insides are finished giving off moisture, trapping the moisture inside.

Overall, look for a variety of shapes and colors for the decorations, and aim for some repetition for balance. 

Decide on the string type, something you have on hand is ideal. I used baker's twine, but butcher's twine, hay twine, yarn, or ribbon would work great too. Just use one type though, or the tree will look too cluttered.

Gather sticks of uniform size and break them so they will create a triangle when strung. 

Find smaller sticks to make the star. A five-pointed star is two upper-case "A"s without the cross piece, and one additional single stick. I didn't need any glue to hold the star together.

Lay out the longer, cross piece sticks and connect them with your twine of choice. Tie on the ornaments, balancing out the shapes, colors, and sizes. You can add fairy lights too!