Hi! Welcome to infinity (potentially).
Yes, i would definitely recommend it (having not even played a game yet, im hooked!

)
heres the incredibly helpful thread put together by Casey's Law:
http://www.dakkadakka.com/dakkaforum/posts/list/440048.page Good for beginners and for finding out more about the game/various factions.
The factions all play differently, but theres no such thing as an easy faction, or a difficult faction, or anything of that nature really. Everything (from factions to individual models) are
extremely well balanced, meaning that not only can you play whatever models take your fancy, there is no such thing as an 'i win' button in Infinity either, or even hard counters really (apart from certain special rules like MSV3 vs Camo...)
So, basically, pick what you like! Pretty much anything you pick can be made to work together, and work well if it meets your gaming tactics, just pick a list (from the
free online Army Builder), use the
free wiki to check rules and get gaming!
Hope that helps...
EDIT: i will edit this to be more comprehensive later....
EDIT2: Actually, i want to see how you find the beginners thread first...ill try and do a rundown of the factions later if you want it (unless someone else chimes in with one first

)