This is a link to Sto-Wiki's FAQ its a great reference for new users
www.stowiki.org/Guide:_FAQIt includes these topics:
1 I have a choice of three professions. What do I pick?
2 Where do I respec?
3 Where is Sulu?
4 How do I get to...?
5 What do I do with research samples?
6 Where's ___ on Earth Spacedock?
7 How do I customize my clothing?
8 Where can I train my Bridge Officers on Earth Spacedock?
9 When can I get a new ship?
10 Where can I get a new ship?
11 What are these abilities I get for leveling up?
12 How do I defeat the Crystalline Entity?
13 What are the three main forms of currency, and what are they used for?
14 What exactly do Mark numbers mean? Is it better to have a higher mark number, or a higher rarity?
15 What's the best piece of armour/shields, or the best weapon?
16 What about shipbourne shields?
17 What's the best ship-based weapon for me?
18 What's the main difference between the torpedo types?
19 How do I improve my abilities?
20 I'm ranking up my bridge officers, but their abilities aren't showing up.
21 I noticed I have my own abilities. It looks a lot different than what my other people have.
22 How can I stop the Borg adapting to my weapons?
23 How can I exchange dilithium for EC?
24 I have another question!