I find for me when I have to make sure a point touches I'll make sure that is on top so I can keep an eye on it when I come to it. You can always fudge a little off on your seam to make it fit perfectly............at least I do anyway. For a beginner, you're doing great as you're trying new patterns. Most seem to use basic patterns of just plain squares put together so pat yourself on the back for going "outside your comfort zone".