you are doing great. It really doesn't matter that much on the size, you can bluff with sashing, or if they are all the same size, anyway, your quilt will be an inch or so smaller. Just use wider sashing/boarders. Just have fun and enjoy the process. Remember, 4 rules:
1. CUT ACCURATELY
2. USE GOOD 1/4 INCH SEAMS
3. PRESS EACH SEAM AS YOU GO
4. TRIM AS NEEDED AS YOU GO
Oh, and a fifth rule: enjoy!!
Your points look great. This is absolutely NOT criticism, just my teaching. Keep in mind on your points that you will be sewing another 1/4 inch seam, so you don't want to trim right up to the point, leave a seam allowance. And, don't look too closely to my work. It is one thing to know, it is quite another to practice. Hey, I chose the right word, that is what we are doing. Practicing!! Life is one big practice session.