I will tell you how they feel to me.
I try to always leave some time since my last heavy meal, I don't think liquid or light food in moderation will cause little problem. My expirence has been a dificulty geting water to go in. I rarely get cramps. (wish I did) Don"t force annything!!
Try to schedule ample time, it usualy takes me an hour for an enema and a shower. Your first time I would sugest much more. Try to find a good private (warm enough to take your clothes off) place where you will not be disturbed, get some soothing music. If you have a willing GF. to help so much the better.
I will asume you spent a few dollars and bought a combo bag or hotwater bottle, and lubercant. (I prefeer vasoline, I think I have tried most)
Get your equiptment set up(use the largest nozzle, you want to hang the bag about two feet above your ass in the position you are going to take the enema in. (are you going to lay on the floor, or bed? sit on the toilet? lay in the bath tub? Siting on the toilet is not the best as it forces the water to run upward uncreasing presure.
I have probably taken more siting on a toilet than any other way.
I would sugest a position where your hands are free to mastrubate, GF can help or you can help her.
If you are ready fill the bag full. the tempreture is VERRY IMPORTANT!! It should be a little obove body temp. About 105 deg.f. cool water does not go in well, it may cause cramps!!
Dont burn yourself!! Let some water out of the nozzle, you don't need air.
A couple of bath towels where you can reach them. (If things get crazzy they can avert a mess)
Get totaly naked, this is why you want a warm place to play.
Get into the position you have decided on and lube yourself up. I lube my Penis (P) first then my ass. Get some lube inside your ass and work it arround, or have your GF do it. Make sure it gets done!!
Put some lube on the nozzle you have chosen all over, thin coat. And slide it in slowly move it arround.
Get hold of your (P) start to mastrubate slowly move the nozzle in and out see how it feels.
Open the clamp the water will rush in, the feeling you get at first only lasts a few seconds as the area behind the anus fills. If it feels like your going to loose it, close the clamp.
From here on do what feels good If you havent got an erection by now get one. Be carefull not to shoot your wad.
I love sex, the erection, building to a point of where I shoot pre cum, then a period when I keep from cuming, and finaly cuming. When taking an enema I enjuoy cuming when the water is flowing, I like to have a lot of water in me when I cum, it makes my ass tighten up and it feels like there is a vacume in my gut!!! Leaking is never a problem!!!
I f there is any thing about this enema process I find a mild problem it is after I cum my boby wants to hang on to the water.
I kind of got a head of myself, You can take as much water as is comfortable, and feels good. If you get cramps stop.relax masage your stomach. Cramps will drive away orgasm. Use them to your advantage. Expelling is also a wonderfull time for mastrubation. For me it slows my travel tward orgasm. Then refill as menny times as you like. I usualy do three or four fills per sesion two bags each.
If you have trouble expeling all the water, try a cooler enema this will probably help. It does for me
How does an enema feel, VERRY VERRY GOOD LIKE NOTHING ELSE!!!! I have been doing them for more than sixty years, and will as long as i can.
After all of that I think i will go prepair one for myself.
Good luck