Change course

I've just started on a Sports Therapy degree. Did it as part of my Btech and really enjoyed it and thought this would be a continuation with modules being "introductions to" and build from there, but after 1st few lectures I've realised the science side is probably starting at a higher level than my Btech provided and am feeling a bit out of my depth. I'm considering swapping to Sports Coaching cos I'm loving Edge Hill and don't want to drop out, and can see a change can be requested in the 1st 4 weeks but wondering how easy it is and is it usually approved?