How Do I Learn New Skills
The first thing you must do is find out what skills and spells you have by typing skill list class, example- skill list barb would show the skills and at what level you will get the skills. By just typing skill it will show you what you have already learned. By typing practice you will see a list of any skills or spells you are allowed to learn at your guild. Before you may use a skill or spell you must first practice the spell or skill at your guildmaster in your class's guild. Once you are at the right guildmaster then you spend some gold or cash to learn a skill or spell of your choosing. The command is practice <skill/spell name>. It will take several practices for each skill or spell to get it to a level of proficency. Bring gold or cash with you however, because the trainers do not work for free!
There is a newbie trainer in the newbie tower to help new players learn their skill or spells without having to know where your guildmaster is, but that ends at level 7 so i would advise you to find out where it is, and most people are willing to help via the newbie channel.