Nooji,
If memory serves, that is only 11 credit hours per semester if your 3 main classes are 3 credits and labs are 1 credit as when I was in school. That wouldn’t even be full time, as we needed 12 credit hours to be full time. If they are 4 credits each that is 14 hours, (which I doubt) which isn’t a huge load. You have plenty of time you just need to manage your time better, assuming you aren't working full time too, which isn't the impression I got from your post.
I took up to 18-19 credit hours (by semester) and never less than 15 per semester, played college tennis at least 2 hours a day 6 days a week not counting traveling, played intramural basketball, not to mention social “activities” and other things.
My point is you have more time now to play than you will later in life. Use your time of no responsibilities to it’s fullest because it won’t last much longer. Probably not what you wanted to hear but that was my experience.
Good luck
TM