Definitely you should pursue the high school diploma. I would choose one of the programs that specializes in adults like
Penn Foster High School or
Citizens High School.
Since those choices are both accredited, there should be no problem with them being acceptable to a community college. That being said, it is always a good idea to check with the college first. I cannot imagine that there would be a problem.
If the diploma program doesn't work out, you can always do the GED program later.
Questions?
Tom Nixon