I was given a box of micro enemas for my RT but only needed to use them for the first week. After that the RT had changed my bowel movements sufficiently that the lower bowel always was empty anyway, so they became unnecessary. No big deal either way - you quickly get used to using them.
I do have a couple of suggestions about RT:
1. Towards the end of treatment (and for several weeks afterwards), the radiation irritated my bladder and I found myself having to pee every 45m all night long. Absolutely shattered through lack of sleep, but the biggest help was buying a 1litre plastic urine bottle (Amazon 😁) so I didn't have to get out of bed to pee. Reduced the exhaustion enormously.
2. Again because of radiation irritating the bladder I got a sharp pain when peeing. Very common, apparently. Cranberry juice solved the problem for me in a couple of days. Magic! Nothing fancy, just the ordinary stuff from Sainsbury's.
Hope the treatment goes well,