A reloading manual, or few would be a great purchase. Lyman makes a great one with a plethora of tidbits to help the novice reloader. It helps to eliminate some of the banging the head on the wall incidents. I truly believe that every reloader should have at least one manual, and have read the first part that describes the loading process, and the reason for each step taken.
Other than that a key limiting factor for many reloaders is disposable income. I know I have disposed of a lot of my income on supplies, and a few upgrades in equipment. Though most has been supplies, and new guns.
No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.