post study work visa duration in UK. IELTS coaching?

A Graduate Visa in the UK allows students completing their UG or Master's degree to work in the UK for up to 2 years.

For PhD program, the stay-back period is for 3 years.

For IELTS Coaching you can check out the FREE IELTS resources curated by Study Abroad Experts and Top School Alumni here. 

Let me know if this helped and if you want any more information from my end.