I just completed offline one and kinda unsure if i want to start the online part
Was curious what is different in most part and if it has storyline or if we choose each misson?
If there is any tip for online starter let me know as well !

there no story at all in online, you do mission, race, fight, you can custom some car just like in the history, buy an appartment ( totaly useless but w,e )

very fun if you have some friend to play with

This. Just roam around the map, mess around with vehicles, weapons, etc. A lot of things to do.

I'll play online if you need some help. Pretty much what they both said.

Online missions with friends are fun, there is also heists and stuff. Lots of free roam stuff.