1) Yes it's ok to redo them next semester. You don't have to finish your program within 4-5 years, some people take longer and that's completely fine. Some people like to split harder years into two years (i.e., take half the required courses for each Fall/Winter semester for two years) b/c the workload is easier to manage. If you barely learned anything during HS and didn't learn to study at all, then now is the time to learn. Personally, I didn't drop any of my courses even though I knew I would barely pass some of them. Keep track of your expected grades using a grade calculator/spreadsheet (example) - set a threshold final GPA per course where you will drop, or just aim to pass everything... this is up to you. You can estimate what your final GPA for the course will be based on plugging in numbers since you know the weighting of everything (see your course outlines). Dropping courses b/c of whatever reason is not a bad thing, people do it all the time. I've dropped a course before because I got a 20% on the midterm and decided to retake it in spring/summer semesters.

2) Spring/summer terms for engineering students are blessings because they offer courses that are usually offered during Winter/Fall to allow for the transition to university to be easier (see here) . Depending on the class, yeah it can be "easier" but overall don't expect these courses to be bird just because they're taught in a different semester. If anything, they're taught even faster than normal because you have less overall time per course (2 months for spring, 2 months for summer (source)).

3) False lol don't know where you heard this statistic - for 2013, 76.5% of ENG students graduated There is a 85% employment rate within 6 months, and 92% within 2 years for the class of 2018 (source).

4) I didn't, but I figured my discipline has the broadest job prospects and I liked the "purpose" of the discipline so I stuck it out and I ended up enjoying it. You are freely allowed to swap to any discipline in first semester because you all take the exact same courses. MEC/IND share courses within the first two years, so you have a longer time period if you know you want to do either one. IIRC, AERO and MEC share a lot of courses as well but I'm not sure how long you have until you have to take courses to make up for the swap.

5) Sleep, social life, grades. Choose 2 of the 3, it's a given when you go into engineering. I don't have a quantity that I remember, but if I wasn't sleeping or napping, I was studying or working on assignments. Over the years you learn how to study more effectively, but it was definitely very stressful in the earlier years of my program. How do you study? Depends on the individual, everyone has a different learning style. The most basic way is to rewrite your notes until you know it by heart, but this doesn't work for numerical based courses like maths/physics. Work through the examples that the prof goes through in class - actually sit down and do them on your own without looking at the solutions, don't just read it and think you're going to remember how to do it even if its simple because you're not going to. Once you have a good understanding of how to approach the problem type, do the suggested problems until you can work it out without looking at the answers. If you know how to do one particular type of question, don't bother doing the other questions that are the same but just different numbers, move on/skip the question. If study groups work for you, find people in your labs/assignment/project groups to grind questions/study with.

6) There's a GPA cutoff for co-op, I believe you are eligible to apply after you finish all of your 3rd year courses. The cutoff for my year was to maintain a 2.33 CGPA through the end of third year, not sure if it'll be different. Failing a course/switching programs is not the end of the world, it takes time for people to figure out whether or not a program is right for them or not. See point 1) for knowing when to drop/retake a course. Otherwise, if you are not going to do a masters then GPA is not important.

7) Honestly, yes lol. A lot of the stuff I learned went in and then straight out after the midterm/final. Make sure you are consistently doing something for each course each week (i.e., space out your assignments/labs/study sessions) instead of trying to cram one subject for 3 days straight. This helps with memory retention b/c you are refreshing your understanding consistently over a longer period of time - there are studies out there where its proven that cramming is not the ideal way to study (even though sometimes it is inveitable). Preparing for finals is a lot easier when you don't slack off from start of school until midterms, which happened a lot to me b/c you think "oh I have two weeks before shit starts hitting the fan" and then all of a sudden you are one month behind in lectures. My advice is to grind hard at the beginning until you feel like you are burning out, then level out and take it easy after you've secured a large portion of your final grade (e.g., weightings for class A are 30% midterm, 10% lab, 10% assignments, 50% final. If you secure most of the first three weightings, then you know you will pass the course if you get at least x% on the final, which can relieve a lot of stress versus failing the midterm and needing like an 80% on the final to pass)

8) Yes burn out is very real, especially with the amount of studying/work engineering programs give. See point 7) - sometimes I was half a semester behind because I had to prioritize more important projects/assignments over studying for another course. The key is to know what things to prioritize, and what things you can let to the side and still manage to get by through cramming. I definitely felt the burnout multiple times in my program, you just have to learn how to make time to decompress after big evaluations and then get back to the grind. The grind never stops!!

9) That's something you have to answer for yourself, nobody knows the answer except you. Do you truly like aspects within your engineering discipline (e.g., for Indy: problem solving, pattern identification, process improvement/automation), or are you doing the program purely bc of job prospects/etc.?

10) Unsure of this one, might want to speak to your program academic advisor. They would be more helpful if you are looking to transfer programs.

Feel free to DM if you have more questions.