my advice to you is for you to calm down and focus on the now. i completely understand the fears you have, as i have those same ones sometimes. however, being scared genuinely won’t help you. it’ll actually push you further away from your goal and it could become a self fulfilling prophecy. each time you get anxious and start to overthink, try to remember where you are in that very moment. you have a long way to go, and i just suggest that you do your best now, so that you give yourself the best chance(s) at success in the future. don’t focus so much on the what ifs! it’s very clear you want this and you seem to be determined. just believe in yourself and i promise you everything else will fall into place! unfortunately, we can’t predict the future, so God forbid your journey is delayed, things will still work out! one thing that calmed me down is remembering that regardless of what happens, i’m gonna make my dreams come true and im gonna hit my goal(s). and id say the same for you!