Tarcante,
I have owned the whole range of revolvers for carry, from the S&W 442 through Ruger Redhawk Alaskan in 44 Mag. There are several categories of problems to consider:
1) Barrel length
2) Recoil and blast
3) Length and shape of the grips
4) Size and weight
Barrel length is very important. It affects bullet performance greatly and affects how you shoot the gun. Snubbies can be very difficult to learn to shoot; I found the S&W 442 to be very difficult to deal with. I disliked the the Ruger SP101 too. Consider buying a gun with at least a four inch barrel if this is your first revolver.
Consider the caliber for the size. I have tried 38 Special, 357 Magnum, 10 mm, 45 ACP, 44 Special, 45 Colt, 41 Magnum and 44 Magnum. You will feel the recoil if you go too small with too short of barrel for the caliber.
The length and shape of the grip affects how the gun feels while shooting. Some grips will make recoil feel worse. The grip is also the most difficult to conceal. Most manufacturers focus upon "shooting" grips--they tend to excessively increase the overall height of the gun.
The size and weight should be evaluated. You may find a steel framed GP100 or S&W 686 to be tolerable, but an N-Frame to be too much. I find a 327 TRR8 with five inch barrel and boot grips to be fine, but my GP100 with Hogues is too much to deal with in a Milt Sparks Versa Max 2. Oddly, I find the Ruger SP101 to be too chunky for what it is. Conversely, I hated the light framed Model 19 with 357 Magnum; it was great with 38 Special +P. You may want to try many different revolvers to see what works for you.
A good starter revolver would be the Ruger GP100, GP100 Match Champion, S&W 686 or 686+. They all have medium frames, have enough weight to absorb recoil and give you access to light 38 Special through heavy 357 Magnum loads.
Some of the tricks I have learned in this process are:
1) Grips can be tough to deal with. Skip to the end and get some Herrett's Stocks Jordan Troopers. They will be made for your hand and can be cut to boot length.
2) Ruger makes a really good revolver in the GP100. The S&W 327 TRR8 and 686 are good if you can stand THE LOCK.
3) Carrying spare ammo is difficult--it is uncomfortable, loaders print and so forth. They take up a full space and only hold five to eight rounds. I try to keep one speed loader or moonclip in front of the holster for quick acquisition. Additional reloads consist of a mix od loaders/clips and speed strips.
4) Look for guns with pinned or removeable front sights so you can swap them out. Some guns come with fiber optic or night sights.
5) Chamfered charge holes facilitate reloads. I recommend that you have this done to your guns.
6) Snubbies can be tough to shoot and can make rapid fire difficult. Be prepared to practice frquently to achieve proficiency. You will discover what calibers and frame sizes work for you.
An S&W K-Frame with 2 1/2" barrel is approximately the same size as a Glock 19.
7) Shooting 22 Long Rifle teaches you trigger control but it does not teach you how to deal with recoil. Recoil management is essential. Keep this in mind when you train.
8) Trigger reset is as important as trigger pull. Read Grant Cunningham's The Gun Digest Book of the Revolver for more details.
9) 357 Magnum is a great compromise round between 38 Special and any of the 40+ caliber cartridges. The non-N-Frame guns are are smaller and easier to carry. This does not mean the larger guns cannot be concealed, but you will need boot grips.
10) Learn on a gun with a four inch barrel. Five is good too, but six is hard to carry.
11) A smooth trigger, both in pull and reset, is essential. Spend the money on it.