Once again, these first two steps should be done intuitively. Just use
a little logic, it doesn't take that much to solve the first layer. You
may not think so at first, but a little practice should work just fine.
Here is an example of how to solve one of the corners in a certain
situation. Each corner should be inserted, or put into position,
individually.
Turn the R (blue) face counter-clockwise. Then turn the B (yellow/
bottom) face counter-clockwise.
Finally, turn the R (blue) face clockwise. You cube should look like
the Step 4 one above.
Here are some additional tips for solving the first layer corners:
Start with a First Layer corner that is already in
the bottom layer.
If there are more than one First Layer corners in the
bottom layer (which is usually the case), start with one that does not
have the white part of
the corner on the D (white/ bottom) face.
When working with a First Layer corner that is in the
First Layer in the wrong position, you need to get it out of the First
Layer into the Last (bottom) Layer, reinsert it into the right First
Layer corner position. Follow the example above in most cases.
When this step is completed, the First Layer of your cube should look
like this...