Summer online college classes

So I’m currently a high school sophomore & I was thinking of taking online dual credit classes through my local community college over the summer. I was thinking of maybe taking pre-cal & chemistry first summer semester then calculus & psychology second summer semester. Everyone I’ve told thinks the course load is too large and/or difficult. How hard would this probably be & is it a good idea? I currently make A’s & B’s in 5 honors classes & I am pretty disciplined. Thanks! :slight_smile: