In terms of community college classes yes colleges may consider them in terms of admission but as to how much it is a college by college decision. I would consider several things before deciding:
cost and affordability (including books)
does your school have a connection with the college
does your school give credit and use towards your gpa
your grades stay with you even when applying to grad school
transportation and class time
What are you giving up to take extra classes?
Can that time better be used for family time, ecs etc
will the classes make a true difference?
No guarantee colleges will give you credit
your schedule if fine for colleges
Most people take 1-3, you said, and you are within the same range
I can’t tell you what is best for you but those are things to consider
One other factor - how did the people who got in get in before you did? I would probably ask guidance what if anything you can do for next year so you don’t get shut out again.