Hello there
I am only too pleased to help tell you what I do.
I am 51 yr old woman, 3 Spinal ops over 3 yrs due to huge calcification, resulted in bad nerve damage of spinal cord to the Thorasic T8/T9/ areas..Thus I have slowly progressed to a wheelchair , but can transfer myself in/out bed / onto toilet etc. ..I do know when I want to go to wee, ..
I have a plastic box beside the toilet, on my left, covered discreetly with a little handtowel, and in it I have KY Jelly tube. plus my plastic catheter always sitting in its wrapper.
When I use it , I squeeze out a dob of jelly, dip the end in it;
I have a little mirror( don't laugh!!)

with duck tape attached so on
"bad days" when I can't find the 'bladder hole' properly

( a real nuisance!) I stick the mirror onto the toilet seat for a moment and 'voila!. I can see where it's to go, & I get the catheter in no problem!..
this was my own ingenious contraption made up out of desperation and embarassment when I found myself STRUGGLING in the loo for LONG times .. (or at strange toilets.

fits in a handbag no problem.
I can void on my own at times , but it doesn't all come away, this is why the need to self catheterise as it 'pools ' and can cause problems.
I have only ever had one UTI in 3 years, (possibly due to sex) , but this is not a frequent thing due to my disability,,
The hand basin is immediately beside the toilet on my right , so I just run the hot tap and let it run thru the catheter .. give it a good shake , and pop it back in it's wrapper.then the box. & wash my hands .
Also wiping the bladder area front to back with a warm damp cloth or damp toilet paper before/after cathetering is recommended, but don't use soap as I believe it irritates sensitive area. I don't do it EVERY time but I do it once a day,to freshen me up, and it is nice and soothing. Also rub with a little KY helps make it less irritated
My continence nurse , whom I've not seen for long time, said to shake the catheter in warm soapy water , then put it in a toothbrush holder , but personally I've found the plastic icecream box & towel good and airy & that's just how it works for me..
I change the catheter maybe once a week, but definitely use a NEW one EVERY time you void if you suspect a urine infection.until it's cleared with medication..
Well my friend , I can't think of anything else at the moment to tell you..I hope this has enlightened you a little to how I do things..?
It's GREAT to be able to know there are others 'out there' who may be doing this strange 'scenario' like me.. but I wish we didn't need to, eh?
I look forward to seeing yours or any others' replies and how they may handle this darned nuisance but necessary problem ??..
Cheers.. Belle .xxx