I'm kinda new to this Sims thing...

Well, You have to take good care of your sims. So to avoid taking care of them all the time so you can't build relationships or something use this cheat "maxmotives" (without the quotes). to eanter the cheat bar hold down "control" "shift" and the letter "c" at the same time. :) hope that helps your future simming!

It's really fun & addicting. I could play for like seriously the entire day without getting bored! you probably should start with just one sim so you won't have to worry about too much, cuz a whole lot of sims can be really hard to handle! Especially with school & work and all their needs and all that... Or just make 2 adults, its easier to handle the adults. And also get a smaller house too, just buy only the things your sim would need. I havent played TS2 in a while but since Ive played the game for such a long time, its easier for me to pause the game & tell each of my sims what to do, then i just press play on the 2nd speed and everything just plays out how i planned... im used to playing on a faster speed
also when you first move on to the lot, every sim will have to use the bathroom, they will need to eat, they wont have a job, and the only clothes theyll be able to wear are the ones you selected when you made the sim
i hope i helped...

There are lots of cool cheats. I would suggest using motivedecay off and maxmotives so you can build up your sims skills and stuff