Constantly questioning my own capability? Starting my engineering degree next year.

Hi! I finished my science undergrad a few years ago and going back to college to do mechanical engineering with specialisation in aerospace next year. I worry a lot about how to excel in the degree.First off I notice that there are a lot of people work on their own hands-on projects like building a drone, circuit boards and design of mechanical devices etc. which I have no idea where to start to learn those things themselves. I am thinking to buy an Arduino beginner. Any tips for what I should look at to become a hands-on practical engineering student?Second, I feel I am so dumb sometimes when comes to problem-solving, for example, this is a riddle asked by SpaceX job interview https://ift.tt/2TCLQao, I got that the part of the answer is the North Pole at the first time, but it seems like many people also knew the answers in like 2,3 seconds ( it took me a minute to come up with the North Pole, my first thought was anywhere on the globe because we don't know how big is the globe. ) then someone even came up with an equation describing the possible area starting from the South Pole. I always do very bad in these so-called riddles and hard mathematical questions, or numerical aptitude test ( there's clearly a low-self-esteem feeling even whenever the word aptitude shows up) I feel like I am too stupid for studying physical science, I mean even if I graduate I would not pass the job interview because I am stupid compared to peers. I love learning but I am a slow learner, I take a long time reading because I feel comfortable if I skim through the context without knowing 100% before moving on to the next page.I worry about even I try very hard I wouldn't score a high GPA. I am revisiting the mathematics and is taking an open online course on the electronic circuit, I am also looking to learn MATLAB and CAD? I don't even know how to prepare for the engineering degree.If I sound like a miserable whiner then I apologise in advance, I just really want a mentor to share experience and some advice and become a desirable engineer, and eventually be able to find a real job, instead of wasting my time doing that useless undergrad and minimum wage jobs. via /r/EngineeringStudents https://ift.tt/34DzjJV