chocolate oh bro, 1stly, good for u to seek advice, but i suggest u seeking from drift.com.my as there're many sifus there.
Less torque, less oversteering, do know that 1st. No point learning from need for speed underground, everything is just handbrake drifting. But that's the real basic la. :D
throttle, depends on how much u steer and more throttle could cause a big oversteer and ur car will spin out.
my suggestion of cars, 120y,cheap but not recommend for daily usage. RX7 FC, A31 good for a future usage, with 30k i guess u can give up on FC then, but not A31, i suppose with goodluck u can still get a good cefiro. Both with turbos, more low end torque. AE86, maybe outta your budget too and no loans. But it's the best car i can think off...try tai yee loong, u want? pm me.....JK :lol: