Races are WON and LOST at the start. If you can master the points mentioned in STARTING ( under Sailing the Course) you are literally almost half way to a good finishing position.
Invariably however you will have to fight for a good position on the start line - especially if one end of the line is favoured. Here you really do need to know your rights and any limitations under the Racing Rules to be able to make SPLIT SECOND decisions to enforce your rights or to bale out of an unteniable situation you have sailed into.
To start with ......... keep it simple !
Remember - been in the vicinity of the favoured end but with clear wind and room to manouver and hitting the line just after the start signal with speed is as good or better than getting swallowed up in a whole bunch of boats and fowl air or getting involved in contact with another boat(s) and or the start mark, while trying for an impossible pole position at the favoured end.
Sometimes Discretion is the better part of Valour!