Hello everyone i'm new into path of exile and first time playing it i directly chose ult league it came as a defualt
u just wanna know what's the difference between normal and ult league non hardcore and what's better for fun and trading since i'm still learning through youtube and currently at act 3
any useful information will be helpful and thank you

There is way to much to even begin to explain. youtube is def your friend here. check out builds, beginner guides, tips, etc.

Standard league is always around, a permanent league (think non-ladder d2)
Ultimatum is the current league (3 month cycle before reset started on apr 21)
Hardcore is permadeath but same as the parent league (Standard or Ultimatum would be parent leagues)
SSF is solo self found, no trades, no party, still talk to everyone in normal leagues in global.

the most profitable to play is usually hardcore current league as there are significantly less bots around to screw with the economy and the current league is always the most active.
standard only exists as a means to test things honestly or a place to consolidate wealth over time that you will likely never use

alright i get that that's what i was searching thank you so much
also can you please let me know like how to search on youtube because there is many guides and all of them are different
about the build i got program called "Path of Building Community" which is amazing showing tree,skills ,..... and many more but for items and what's worth and what's good playing with that's what i am looking for the moment and thank you

Standard is like non ladder in d2
League is like ladder in d2

Most people play the new leagues.

But some enjoy just playing standard.
Standard doesnt have the new league mechanics.
But all your old items will be in standard after the new league ends.

Most leagues are short 3 months but new ones start a few days later.

Leagues (Ultimatum) are the best especially for new players.
Its where real trading and real action happens, standard is just for old players to chill, not really much to do.

the hard part is that there is so much information that you need to know as new player it's really hard to say good/bad.
the best thing you can do at this stage is just learn as much as you can about everything you can, check your sources against the wiki/testing in game
PoB is the best possible tool period for making/refining/looking at builds
poe.ninja is a decent source of builds to look at to learn about interactions

Play through the story and google any bosses you have trouble with.
Max your resistances at some point (75@) and get life in your rare gear pieces.

alright thank you for the help everyone

Hardcore is pointless and will just leave you wondering why it even exists on such a buggy lag riddled unoptimized game.

true

Softcore is pointless and will just leave you wondering why it even exists on such a buggy lag riddled unoptimized game.