First brew, all grain, hit your temps and volumes, and used a yeast starter?! You are lightyears ahead of your average first time brewer my friend. Nicely done!
Don't sweat the yeast starter volcano. Anyone (like me) who uses an erlenmeyer to boil in will have a story (or 10) about doing the same thing.
Enjoy your beer, and keep it up! It's all about repetition and establishing your pipeline.