Sets and Rep Suggestions

Hello all, I am new to the board, I have been lifting/working out for 6months now and I am starting to get more serious and more passionate about it. I have been expanding the different exercises I have been doing, and I was look for some suggestions as to number of sets and number of reps I should do for the following exercises:
 
Pec Deck
Tricep Cable Pushdown
Leg Extension
Dumbell Fly
Lat Pulldown
Shrugs
Upright Pulley Row
Side Deltoid Raise
Front Deltoid Raise
 
For the most part, I am currently picking a weight for each and doing it as many times as I can and once I can do about 25-30 reps for that exercise, I will increase the weight the next time I do that exercise.
 
Any advice on different sets/reps for these exercises would be appreciated.
 
Thank you.

When I train people I suggest they spend the first year mastering variations of the basic compound movements. I think once you have built a year of foundation with compound movement you should slowly incorporate the isolation movements.  This theory is not so unusual, I read that victor Martinize still uses only compound movement for his triceps. and one other new guy used only compound movements while training for the Night of Champion

Troy “Awwsum” Pearsall
What? know ye not that your body is the temple of the Holy Ghost?

2-3 sets, 6-8 reps.