Being as new as you are, practice technique, not tricks! Learn how to do the basic work and don't worry too much about the tricks.
Get a copy of the Bill Tarr books NOW YOU SEE IT;NOW YOU DON'T and work on nothing but their content for the next six months or so. You'll start discovering a whole new world of possibility once you do this and more important, be better prepared at developing your own routines.
Don't get addicted to commercial effects. I know you'll be attracted to many but try to learn the basics behind the magic before you run out, waste loads of cash on things that seem nifty in the moment. If you do this, you'll be much happier in the long run and your parents/spouse won't be peeved over "all the junk" you accumulate.
You will want to get yourself at least one of the primary courses in magic too, Mark Wilson is the easiest to learn from and most popular these days and it will give you a reasonable overview of things.
As has been said, the time ventured into learning a routine varies. There are those that have invested YEARS into learning the Linking Rings or Cups & Balls as well as livestock or silk type manipulation and then there are those that barely invest a few months at LEARNING any of it, who do "ok". . . it's what you want to get out of it. If you're fine with being "ok" then you need less practice time in most cases. If you want to become an accomplished magicians however, then you must treat each bit that you do as a musician does learning an instrument, pouring hours a day, day after day, into your practice for years before KNOWING that you really are "good".
The question is one that only you can answer.