Welcome to the Forum.
Alot of people still play it :fallout: . There is a huge loyal fan base for Fallout and Fallout 2.
Fallout 1 is nothing like Fallout 3. First I hope you know that the game is Turn based and Isometric. So if you were expecting it to be like Fallout 3, then you will be in for a suprise.
Fallout is a true RPG. You have to think your characters out in advance.
Your actions have consequences so think before you do, don't go around killing everyone.
The game does not hold your hand, there are no quest markers.
Everything has weight.
Perks happen at every three levels, four if you take skilled as a trait.
Things are rare and expensive, you will not just find stimpaks everywhere.
You can't heal crippled limbs with stimpaks.
Drugs have nasty after effects so use with caution.
You can aim of the eyes and groin.
You can kick.
There are multiple endings.
There is a time limit to find the water chip.