My First Harvest! But I Don't Know How To Harvest!

Hello i am at my first harvest YAY!

i have a some questions!

1, Is my top bud my best bud of the whole plant?

2, My bottem buds are ready and mature but they feel less dense then the middle which is also less dense then the top one! IS this normal?

3. Should i seperate the 3 diffrent grades of density buds?

Thank you for the help

1. Yes
2. Thats how it works- But as for the trichs/pistils you need to mean average when 70% of trichs are amber then the plant is ready.
3. Always,