Firstly;
http://forums.d2jsp.org/topic.php?t=61584284&f=60 Boom - Fat loss 101.
Secondly; there are many great tried and tested routines. One such beginner program that has had an overwhelming amount of success is 'Jason Blaha's novice full body workout'. If youre gonna be 'cutting' and eating in a deficit, do the 'cutting version' (less volume so you dont burn out). You can google the deets of that. It's all quite easy to find.
Lastly; if you feel like you need a boost before the gym, sure, buy some pre-workout, or just drink some coffee and save $$
As mentioned in fat loss 101, all you need to do to lose fat is to consume less energy than you expend. Thus the eating lifestyle of IIFYM (If It Fits Your Macros) is largely propagated due to its simplicity, and will greatly help you.