Gay orientated adult/ sex shops ( stores ) can probably sell you a simple and cheap bulb douche.
Its a small rubber bulb you fill with water and it has attached a short curved pipe with holes around it. You fill with water and some guys would add a little white vinegar. Do not put soap/ shower gel/ detergent in there.
After you go to the toilet - so you are basically empty - you gently insert the pipe into your anus, squeeze the bulb to squirt some water up, and then after five to fifteen seconds,you release it. A few small strands of faeces may come out with it, so you need to do it over the toilet bowl.
Two or three squirt/ releases should do it. If it needs more, the problem is more likely your diet and/ or exercise and/or sleep.
Do you tend to be "regular" in terms of what times you need the lavatory?
On ass hair- it is certainly possible to wet shave it just like your face, but just be careful, it's difficult/ impossible to see if you do it yourself, so there can be little nicks,and cuts. You may be able to position a mirror to help but getting a friend to help is sometimes the best option.