Concur with fast dogs. An auction league is probably not where you want to start. Generally these are harder to manage as you have the added burden of salary management without any experience. H2H roto would be a good place to start as you can make mistakes and recover.
You don't need to spend hours everyday to manage just one team, particularly if it is weekly league (which I also recommend for beginners). Just by virtue of moving players around, a daily lineup league requires more time.
Sounds simple, but I suggest reading your leagues rules paying particular attention to adds/drops and scoring as not all leagues are created equal.
Most people don't realize that fantasy sports, particularly baseball, is a game of mathematics based on athletic competition. Do your homework and learn the terminology and you will be fine.
Good luck and have fun.