Here's some tips.

Don't gamble what your not willing to lose.

Get in, get out.

If dealer is showing 2-5 and you have 16/ 17, stay.

If dealer is showing 6+, and you have 12-15, hit.

If dealer is showing 10/A and you have 16 or lower, hit.

You need an average of 18.55 to win hands consistently.