Step 5: Use it.
Luckily, I have something to lean my trellis on. If you don't, either cut another piece of wood to hold it up, or hang it on something. If your plant needs a trellis, it probably has little tentacles coming out all over looking for things to latch on to. They look like curly strings hanging around. All you need to do is guide a few of these strings onto your new trellis and they'll figure out the rest. It's been a couple weeks since I made this, you can see the difference yourself: