Alright, first take your time to read as much as you need to make yourself comfortable. Check out the city list and the race list for some detailed information on each place and species. If you want to stick to human (probably easiest) then that's fine, but it helps to have at least a basic knowledge of the other races you'll be interacting with.
I personally recommend devoting a lot of time to just reading up on the lore. Mizahar can be very complicated, and the more understanding you have of this place going in the better. You can also pop into chat if you want and ask questions in real time, I guarantee the people there will be happy to help.
Once you're satisfied that you know enough to get started, take a look at the
Character Sheet Forum. You'll need to post a Character Sheet (CS) at some point, but feel free to take a look at the other ones there for examples. There are also templates for various locations if you want to look at those. Once you think you know enough, feel free to post a Work In Progress (WIP) and start developing your character concept and history. Or alternatively, just get the facts down like birthdate and race and possessions and then role-play for a bit, then come back and write the concept and personality later once you get a feel for your character.
Take your time when deciding starting location and skills and such, at least that's my recommendation. It can take a while to familiarize yourself with everything, but it's worth it if you go in knowing what's what. Remember you can ask whatever more specific questions you have here in this forum or in chat if the lore isn't helping.
Good luck!