Actually, the title is somewhat misleading. For once, the original (Rubik) is one of the worst product to buy. Much better cubes are available, much more enjoyable and easier to play with. See "My cubes" below.

Solving

The Jperm approach works really well:

COMMON TOP LAYER PROBLEMS
Step 4. If you can only get 1 or 3 edge pieces of the top cross, you need to reassemble the cube as solved.
Step 5. There should be no problems here.
Step 6. If you ever get only 2 corners in the correct location, you need to reassemble the cube as solved.
Step 7. Finish the 4 moves (don't stop at 3) every time. Turn the bottom (don't rotate the whole cube) to get the next piece. If it STILL does not work, you need to reassemble the cube as solved.

Sub 30

Use CFOP:

• Cross
• F2L (watch "Intuitive F2L" video)
• OLL
• PLL

Youtube channels

Recommended Youtube channel: https://www.youtube.com/JPerm

Starting with this video:

Cubes

Best cubes:

My cubes

QiYi

Valk 3 Elite M by QiYi

The Valk is a new speedcube designed by QiYi with the influence of Mats Valk.

Yuxin

Little Magic V2