I've been out of brewing for quite a while now. And was a newbie before I fell out of the hobby. I bought an English Brown Ale LME kit over a year ago and had it stored in the closet. Decided to brew it tonight. The kit included a Nottingham dry yeast pack and I decided to make a starter thinking it would help being that the yeast was old. Also I added 2 small jars of chocolate PB2. My questions: After doing research (after pitching) I found that starters are not good for dry yeast. Is it possible I'll be facing a slow/stuck fermentation? Also I noticed a light layer of fat/grease on top of the wort. I'm assuming the PB2? Is this going to affect anything?