Spells not working!?

In all honesty, 2-3 hours is not a long time at all to be mastering the skills that go on behind the scenes in a spell, especially considering many people take weeks, months and sometimes longer to study before they even consider attempting spells,rituals or magickal workings.

Which is likely the reason why they aren't working out for you.

Pardon me, but I laughed. 2-3 hours is nowhere near enough study to successfully practice magic. I've been practicing for 35 years and even so on occasion a spell does not work for me or works in a way I didn't anticipate. Please understand that you will need to put in more than a couple of hours to expect spells to work for you. It is going to take serious study if you want to be good at magic.

And while luck spells might work, spells to control the weather or to make the weather do something it isn't apt to do, such as snowing in the tropics, are never going to work no matter how much effort you put into them.

You should meditate and improve your ability to channel energy and work with astral forces. Performing a series of steps won't do anything unless you also remember to actually channel your magic.
You could also have a look at the trouble shooting your spells post: some very useful info there.
One last point, remember that you're only limited by your mind.