So many things at once or not??

So my cg will come to around ~7.5 (hopefully) after sem 4 ke results come out and I'm already taking a research project under a prof in summer. I also have to do intern prep in these 2 months, mostly im targeting tech. I was thinking of taking up 2 oc's also in summer (3 credits each) and I can manage at least a 9 grade on both if I study decent. So I was thinking am i just taking up too many things at once or should I treat summer as a normal semester and try to get all these things done? The sg of these 2 courses will not get added to intern cg but it will be added to placement cg and my goal was to reach 8 by then.(by ending of sem 6) Will they tamper my intern prep? Should I take these courses or not?