A 22 LR revolver with a swing-out cylinder for faster reloading and about a 4" barrel. Maybe a Smith 351 PD. Then a Ruger in 9x19mm, one that fits your hand well. Both can be used for defense.
The 22 will pay for itself in ammo, teach you to shoot without flinching, and revolvers are simpler and more reliable to operate. A better, safer beginning pistol.
The 9x19mm has more power. The semi-auto with extra mags will provide more shots without taking much time to reload. Ruger is a reasonably priced pistol that is reliable.
The other combination I like for carry and woods is a 5-shot 2" barrel 38 special with a 357 mag 6" barrel. This is better if you want defense in the woods against a black bear. Both pistols can be loaded with 38 specials for home defense. The smaller one is easier to conceal and carry. The larger one will provide better penetration and quicker kills.
Some guys do well with a 45 ACP for defense. I wouldn't recommend one for the woods. But you need to be realistic about which gun you would really carry in what situations.
There is nothing like actually trying them first. See how they feel in your hand, and how you like to shoot them. Many gun shops with pistol shooting ranges have rentals. Take a safety course, do some shooting, so some reading, do some shooting. Think about it and give yourself time to adjust to shooting and get used to a variety before you make a decision. By then, you will have your own opinion, and I'm sure you will have people giving you lots of opinions. Some of them will even know what they are talking about, but they are all flavored by their own experience.
Here's a range of articles to give you a little insight into the basics of handguns.
Handgun Stopping Power, Calibers and Loads by Chuck Hawks
http://www.chuckhawks.com/handgun_stopping_power.htm
The truth about “stopping power” – Anatomy First (people)
http://www.breachbangclear.com/the-truth-about-stopping-power-anatomy-first/Handgun effectiveness: cavitation, penetration, hydrostatic shock, caliber; one-shot stops
http://en.wikipedia.org/wiki/Handgun_effectiveness
Mossad & .22 for defense/escape, C.E. “Ed” Harris
http://shilohtv.com/?p=3574
Moro fighters, drug free, proving .38 Colt and 9mm insufficient sidearm, .45 Colt was. 12 gauge preferred
http://www.morolandhistory.com/Related%20Articles/Legend%20of%20.45.htm
The .380 ACP Sucks" by Nutnfancy
https://www.youtube.com/watch?v=ZEmF430-buc
Concealed Carry Pistols
http://www.chuckhawks.com/concealed_pistols.htm
Handguns for Home Defense
http://www.chuckhawks.com/handgun_home_defense.htm
Conceal 12oz Pistols
http://www.humanevents.com/2011/01/04/12-concealed-carry-guns-12-ounces-or-less/
Ladies Conceal Carry Options - Guns & Holsters
https://www.youtube.com/watch?v=SiMQIYIDVC4
Hope these help. Good luck and shoot safe.