walah... you fly JJRC H36 for few days nia become expert liow??....

I'm still unable to fly a quadcopter properly, you are making me feeling very old and clumsy... sigh!...
Tello is only an indoor drone good for selfie, and extremely good for beginner to pick up flying skill. Do NOT buy another better drone now. Just get another same JJRC H36 if you play too often. The brushed motors of JJRC H36 get heated up and burnt easily and you need alternate sets to cold it down while flying the other one.
Do NOT buy any better drones yet, you need to figure out what's is more fun for you next...
a) Racing drone: About S$100-200 for racing and aerobatic purpose. e.g. eachine aurora 80, Emax babyhawk
b) bashing drones: About S$200-300 for outdoor free flying and exploring. e.g. Hubsan H501S/502S
c) Aerial Photography Drone: Very good aerial video produced, about S$600-700. e.g. DJI Spark, Xiaomi Mi Drone 4K
d) Aerial Photography Drone: professional aerial video produced, about S$1.5-3K. e.g. Phantom/Mavic, Yuneec Typhoon H
watch Youtube video and know what you like first. Keep playing and having fun with your JJRC H36....
cannot teach you anything after this liow, you are now more expert than me...