FTM Need clarification

Okay so I keep reading things that say I should be feeling "Braxton Hicks" by now and that I should have started to feel them a while ago... I haven't felt anything and don't know what they feel like! Also I'm now reading and hearing things like "watch out you may go into early labor" or "what to expect for early labor" etc. I have NO IDEA what to expect and what to look for STILL... All I know is start to watch for the mucus plug breaking, don't do anything strenuous on me or baby, "I'll know when my water breaks", I'll KNOW if I'm having a contraction. HOW AM I SUPPOSED TO KNOW THIS!!! I've read article after article, blog after blog, and story after story just trying to understand WHAT TO EXPECT. Not even the articles titled "what to expect" told me what I need or want to know! So my questions here are

1. What do Braxton hicks feel like

2. How often do people usually have Braxton hicks

3. What do contractions feel like

4. When should I REALLY expect to feel contractions or Braxton hicks

5. What does the mucus plug look like and when do I need to worry about it coming out

6. What if I don't feel contractions and go into labor without knowing it???

Please help I'm super confused and lost and I've read so much on this stuff I don't know how I could be...