Personaly i have done both ways...Just useing primary and also useing a secondary.
A lot of it is personal prefrence. There is upside and downsides to both.
Useing just primary only is fine as long as you dont let it sit on the yeast/trub for a long time. 3-4 weeks would be the most i would do...But again personal prefrence again on that. As for bottleing/kegging you might pick up some trub or little bits the first couple brews till you get that hang of it. Personaly i stuck a airlock bung under 1 side and siphoned that way till i got the hang of it.
Secondary: I used to do this with every batch of beer i made, Till i got tired of cleaning all the time
Personaly when i was brewing every weekend, I would let it ferment for a week, Move to a secondary and wash yeast..repeat.
I quit doing that for a few reasons. One i dont like clean 2 carboys from 1 batch....Its sadly enough my least favorite part of brewing. I also am not "showing" off my beer to anyone. So if my beer has bits in it... It dont matter to me. If i was going to show off my beer or have it judged, I would use a seconadary for a few weeks just to help clarify and make sure there is nothing left behind. Cold crashing the beer will also help.
As for ageing beer, I dont age very long. 1 week ferment 1 week age..Keg.
I allways make 10 gal so the 2nd keg gets to age 1-2 weeks before i drink it dry. But the last glass allways does taste the best....
Hope that helps out some.
If i was you, I would try out both and play around with it.
The thing about brewing beer, Is there is lots of ways of doing the same thing, Doesnt mean its right or wrong...its just personal prefrence.