Hey there and welcome to Ultima.
There are lots of things you can do to get started, those include:
1) Making friends, that is imperative, PSO is just not the same Solo. Be careful on who you make friends with though.
2) Raise your MAG, having a high level MAG helps you out SO much.
3) Take your time levelling, it's hard on Ultima but get to know the game before jumping to 200. Learning what to do and what you're effecient at saves you a lot of hassle.
4) If you're going to trade, make a locked room, agree with the person beforehand and use the trade window; note some items can't be trans