The first time China and Wuhan

Dear Team,

This Saturday, I will have the first trip to China. Also first time in WH.
I have heard that mobile SIM is getting difficult to buy nowadays.
Do you know anything about it?

I will take high speed train from Hankou to Jingzhou later.
My arrival time is 11:05 am.
Do you know how long should we expect after landing to Hankou station buying tickets to Jingzhou and go to platform?

Thank you very much for your help!