correct .. LIPO can provide powerful burst of current (A) NiMH cannot

IMO you don't need to buy first if you just want to learn. You may try to buy LAMA first then get your Tx from the package, and use that Tx to learn CP heli in a simulator, that make more sense to me.

Most of us actually fly the heli in a simulator first before we really try the new move with the real heli. CP heli is fast and you have to build up your reflex with the 6ch CP heli or else you might end up with crashes. Usually a crash with 6ch CP heli need to replace feathering shaft, main shaft, blade, gear, flybar or tail boom. That would cost around RM100 for a 450 size. I am taking the BCP as a reference.

if you are really into this hobby, just buy a 4 channel one
i have already bought so many 3 channel / 3.5 channel one, all last only a few days
like the one i bought from bts few days ago, the main rotor is not turning now after i charged it, damn
before i charged it, it was still working fine, it last only 2 days, 3 times of playing><
lets say i bought 3 x 3.5 channel
1 for rm150
already cost me rm450

if i buy 4 channel one. it cost around rm200
i still have the spare rm250 for repairing
at the same time i have more fun and experience real rc
now i swear if im buying again, i will buy one which i can easily find spare part for it
so that it last me forever and much more worthy for long term