Almost any commercial chick starter should be fine, just make sure it is medicated with amprolium - or be prepared to treat your birds for coccidiosis when they get older.
Give the chicks as much quick-oats as they want. After 5 or 6 days, start mixing in some of the commercial starter, being careful they don't waste too much by pooping in it.
By the age of 2 weeks they should be on 100% chick starter. The exact amount of time is not too critical, and you may get some pasting up anyway if they get too hot or too cold.
If that happens just gently remove it so they don't get totally plugged up which would prevent them from defecating. If it is really stuck on tight so you can't remove it without ripping their skin, try soaking their butts in warm soapy water, then brush it away with an old tooth brush when it softens up enough to do so. A little common sense goes a long way.