Hello! Welcome to tRO!
I would recommend starting off as any of these classes: Knight, Priest, Stalker, Hunter or Assassin.
I won't discuss each class thoroughly but here's an example of why I have chosen knight as one of the best starting classes to play.
Knight: Knight/Lord Knight is one of the best farming class there is in RO, not to mention it is easy to gear too.
This video is a good example of how's its going to be like if you start off with a knight class. You can easily farm sleepers (and earn zeny) with just an undershirt/pantie combo with a refined brocca!
How to get bronze coins? In this video you can see that he used bronze coins in order to rent a refined brocca. Bronze coins are obtainable through the Eden HQ which is also good to do when you're new to the server! (As it gives you some equipment to start off with once you do certain quests)
More information about Eden quests :
With all of these said, I'd also recommend you to read through our wiki as well: https://wiki.talonro.com/Main_Page as a lot of guides for newbies are explained there; things such as:
Custom Features in our server
Rewards systems and so much more!
Anyway, it's great to have you here in our server! I hope you'll have a blast and I'll see you around in game! Don't forget to join our discord too, surely a lot of people will help you if you have any questions in mind, it's also a great way to be updated on what's going on either its server maintenance/events/etc.