i used to teach guitar for a bit. it doesn't take long, you just can't get frustrated. it takes a little bit of time and practice to get your finger strength up and your calluses to form (it will hurt).
my advice is to definitely start with an acoustic, as most of them have higher action, meaning they will be harder to play and make sure you aren't cutting corners so when you switch to an electric it feels like you are playing 10 times faster and easier. if you pm me i can tab out some easy training exercises for you to play. if you want to get good you should play everyday for at least 30 minutes, but the key is you have to play. it takes a little bit to get used to it. all that was said up above are good ideas as well, but i would recommend just looking up all the basic chords (A, B, C, D, E, F, G) and practice playing each one of them and then switching to another one. Practice doing this over and over again in different patterns and your fingers will start to catch on.
As far as guitar buying advice, if it is something you truly want to get into and play for years to come, i wouldn't skimp on your first guitar. It just doesn't make sense, especially when you are talking about acoustics. A good acoustic will age with you and sound 10 times better once you have broken it in and have been playing for a while. If you buy a cheap guitar that is what you are going to get. It may or may not be with you after 5 years. I'm not saying you need to go crazy, but if you pick up something try and note the craftsmanship, the type of wood, if it has a binding around the outside of the guitar, the fretwork, the neck work, etc. Most of all choose your sound. If you want a luscious full body sound go for that big full bodied guitar. If you want a crisper sound maybe go for a cutaway. Most of all just strum it. Learn one chord and play it on every guitar you see. You will, most likely, get a different sound out of every one of them. Also, for the future, only play elixir strings on acoustic, as they make your guitar sound so so so so much better. I haven't really been in the guitar market for a while, so i couldn't tell you any new stuff that is worthwhile, but i think it is important to spend a little bit on your first guitar so it pushes you to play it longer and want to play it. I can't tell you how many students i had give up because their guitar didn't help them along.
I hope this helps, and good luck.