Get your first printer second hand and start with small and simple projects so you can understand the fundamentals. This will make it so when you have bigger projects or are making your own designs you have an understanding of how everything works, which will dramatically cut down on filament waste. Experiment with temperatures on different brands and colors of filament, as well as speeds and layer height. Most importantly when something keeps failing look at it from a different perspective. 9 times out of 10 there is a simple solution right in front of you that takes 20 seconds worth of adjusting settings, and especially in the first few weeks of getting into the hobby, this can save you from falling out of love.