A little tip with the corrugated edging is that it needs to be dug into the ground. You'll then use pegs to secure it in place, and then backfilled soil on either side holds it straight. You should find this step-by-step guide useful: How to install garden edging.
That overall area looks like it is sloping away from the house and it appears that there is also a mound where the palm is. Perhaps you might like to look at levelling the front area into one flat surface. This could require a small retaining wall running parallel with the front of the house and perhaps a timber step in front of the current concrete patio step. How far you can reduce the soil height around the palm might be the limiting factor to this though. I believe a flat surface would improve the looks of the area and provide more landscaping options.
Let me mention @Yanick to see if they would like to join the discussion.