JEREMY,

It sounds from your post that you want to go it alone. It's a tough road bud! As JOHN posted, it's not as easy as it looks. Some have it some don't. There are those that never get it. and there are those that can SOLO in no time at all.
With that said and hoping you will do as JOHN recommends and find an instructor and go by his recommendations. Let's get back to your question.

I would advise you to buy a plane that a private party has to sell. (I had one but sold it) You need a trainer that someone has already "TRIMMED OUT" IE: One that will fly straight and level after take off. That's probably the next hardest thing besides LANDING, is to "TRIM" the plane in flight for straight,level flight. I've read about quite a few here on RCU for sale, Or better yet, look for a hobby shop in your area and get the name of a local club, and contact them to see what their members have to sell. Many new flyers will sell their beginners stuff after they progress to the next level. (but if you're going to contact them about a plane, why not find an instructor)
I like the CARL GOLDBERG "EAGLE ll", "RCM TRAINER","RIGHTFLYER 40" for just a few.
As far as "GAS OR ELECTRIC" That is up to you. Gas will stay in the air longer, have more power.(unless you spend lots of money,and research electrics) You land a GLOW engine,refuel and hit the air again. Electric you either have to have additional batteries charged with you or recharge at the field with a 'quick charger" (MORE EXPENSE) Electric is by far way cleaner,(no fuel residue) quiet! (it doesn't tick the BULLS off) Way easier to start! (no starters,no glow plugs, no fuel jug to carry)
Each has it's good and bad points. I like GLOW. but wouldn't mind having a small electric to fly around in the back 2-1/2 acres.
However you decide, WELCOME TO THE HOBBY/SPORT ! PLEASE get some assistance (an instructor) to at least get started and until you can fly on your own unassisted. But by then, you will find that a very large portion of flying R/C is the BULL you shoot at the field with the GUYS. It doesn't matter how old/young you are, everybody has something to talk about that keeps all age groups together.

DESERT RATT