K
First, a point of admin, it would really help if you could in future create a new thread rather than tagging your post on to another one, that has nothing to do with the subject of your question
With regard your question.
First, it will depend on whether you are receiving Income Based or Contribution Based ESA?
Do you receive DLA?
Is the course full time, part time, or distance learning?
Are the requirements of the course consistent with the statements you made whan completing the ESA50?
Starting education may be classed as a Change of Circumstances, requiring you to notify the DWP!
Unfortunately, as you can see this may not be a simple decision, you really need to sit down with a suitable advisor who can sit down with you and go through your options.
Where to get advice?
Gordon