What level are you are in your engineering degree?
If you need help with standard type problems in Linear Algebra at the first-year level, please let me know, and I would try to help.
Since you're in the northern hemisphere. I guess classes will resume in September.
Here in Australia, semester 2 begins at the end of July.
I'm going to be working on decomposing Calculus problems into standard solution patterns soon. I've already covered quite a lot in Linear Algebra. So by the time you start your semester, I should be able to help with calculus also. :-)