I built one from a kit a couple of years ago (Kyosho SR30-X, [length 40.6 in]). That was actually the fun part working on it 24/7 until completed. Had it 'professionally tuned' (rotor adjustments, linkage etc) prior to my first attempt at flight.
Keep in mind that parts are somewhat expensive. "Boom Whip" typically cost me a couple hundred dollars or more (per experience) and really doesn't help with the confidence level while 'still learning.' Boom Whip is what happens when your landings are to hard and the main rotor blades flex downward on impact with the ground and destroy the tail boom, drive shaft mechanism, assorted linkages etc. Not to mention the main rotor blades which now resemble kindling wood. Extremely disheartening, especially when your flying altitude was only about 3 feet.
You must be able to think (and react) to three dimensional flight charastictics and have the uncanny ability to make adjustments prior to them occurring.
Chances are since you've already gotten the 'bug,' you'll probably end up with one anyhow. I'd definitely suggest you build one from scratch. It's surprising what can be learned just by assembling the transmission, rotor mechanics and all the rest of the thousands of pieces. It will also pay during your many rebuilding experiences.
Don't get me wrong. I still love watching an accomplished heli pilot flying upside down, backwards and all the other really cool stuff. It takes time, patience, dollars and an acute sense of concentration. Since these are in short supply on my end, my chopper has been hanging from a ceiling hook in the garage for quite awhile now. I've often considered of donating it to a local law enforcement agency thinking they might add a mini cam or other trinket and help nab the bad guys. Go for it, it's a hell of allot of fun
