"Before I say anything, this plan makes a 30" tall table. So if you want something taller, adjust the leg pieces length accordingly.
This table isn't complicated, however I concur with other's that there's not a complete bill of materials (esp. the metal rod, screws, etc) and the instructions are relatively lacking in detail.
Anyone with proper tools & experience with constructive hobbies or trades should easily intuit the parts of the build that aren't clearly articulated.
I'm building this table with reclaimed lumber as a wedding gift for my brother. These boards are old growth, with dense grain and much heavier than soft species construction lumber. Point being, think about overall weight when choosing what wood to work with. Also, have fun going down the rabbit hole of choosing a finish for outdoor furniture."
Simple Picnic Table Plans 2x4 Outdoor Furniture (DIY, easy to build)