Of the catheters I've tried, my hands down preference is for the Coloplast Speedicath Flex.
https://www.allegromedical.com/catheters-c539/coloplast-speedicath-flex-coud-p585940.html
They come bent in half so can be concealed in a pocket, but that's a minor benefit.
IMO, the major benefit is they come packed in saline, so are fully hydrated out of the package and are very, very slick along their full length.
Also, the tip is tapered and has a little ball shaped end, so goes in and opens up your prostate passage gently, and you start to pee.
The package ends unscrew so only about 1" of the distal end is exposed, so the catheter can easily be gripped without spoiling it's sterility and can easily be guided into one's passage.
If you've never been cathed, I'd suggest trying this product first. It is, IMO, the easiest and most gentle of any I'm aware of and can be used in bed or on the toilet. The catheter is protected and doesn't need lubrication.
The only down side is if you leave it in too long, say over 20 minutes, the lube tends to dry out, making removal kinda ouchie.
Note that sterile gloves and an antiseptic to clean the insertion area are a MUST if you don't want a nasty UTI.
The catheter does not have an integral pee bag, but the one in a Cure K2 Insertion Kit can easily be attached. It holds 1500ml. A K1 kit does not have a pee bag.