38 weeks and was checked today and only 1/2 CM dilated, cervix is thin and soft. Is there natural ways to speed it up? (dilation)

Be patient. You may go on time. Stay active have intercourse! really!
You can walk. What is going on now is cervical ripening. Walking or having intercourse (if it's comfortable for you) are two possible ways to encourage more cervical ripening or labor. However generally the cervix dilates in its own time.