OP, I'm exactly the same height as you, 145lbs @ 10%BF, 26 y.o. But I was really skinny 2 years ago before I started lifting (110 lbs @8% BF) so I've never been in your shoes. But I know guys who have, so I've seen what happens.
Even if you think you lose weight fast, bear in mind that the more weight you have, the easier it is to get rid of it.
going from 40% BF down to 30% will take you 10 times longer than from 50 to 40. I know guys who took months to go from 30% to 20, and years from 20 to 15. Don't let this discourage you, I'm just saying because I see people set overoptimistic goals and quit if they don't get the magic results they expected. But your objective should be
" In 6 months I will look so much better than what I look right now, I will look at the mirror and be so proud of what I achieved" You can't imagine the difference going from 50 to 25% looks like, specially with clothes on.
Some good advice about intermitent fasting and keto... people do get great results. But for someone that knows absolutely nothing about diet, counting calories, macros... don't you guys think it may be overwhelming to go straight for that?
The first thing you need to learn are basic nutrition concepts. Read, read, and read more. There are great books out there, for a beginner I really liked the nutrition section in "Bigger, Leaner, Stronger" (really cheap on amazon, can't vouch for the workout routine but doesn't seem like the worst out there, he also has a recipe book that may be of interest).
As for diet, the good news is that yours sucks so much that little changes go a long way. Regardless if you choose to investigate more into keto or intermitent fasting, do this and you will be a big step closer to your goals.
1 - NO FUCKING SODA. Remove liquid calories from your diet, they are way too easy to overdrink, you don't even realize it. Specially soda and beer. Milk and stuff like that may be ok sub 15%BF, but for you it's too easy to go from caloric deficit to caloric surplus (it just takes a couple glasses of milk for short guys). Learn to love water, soda and green tea).
2 - If you can't quit fast food all of the sudden (be honest with yourself here) start by reducing it to one meal a day for a month or two. Aim to remove it from your diet on the long term.
Better to change your diet slowly than to go cold turkey and burn out in a few weeks. It took you years to build bad habits, turning your diet around all of the sudden may be overwhelming.
3 - Reduce (and ultimately eliminate) overly processed foods. You may want to start by replacing simple carbs (cookies, muffins) by healthier snacks that you love (greek yogurt with berries, or whatever) and crappy snacks by tasty yet heathy alternatives (google is your friend). Satly snacks (potato chips, etc) should also be slowly takken out of your diet (google is your friend for alternatives). If you get hungry all the time, greens have no calories and fill you up (you may consider getting a juicer to make one or two green juices per day, there is a great thread on the forum).
4 - learn to cook simple stuff. Spend hours watching this guy for inspiration.
If you have no idea about cooking, and you are a busy man, set aside 2 hours per week and try a new recipe each week.
5 - Meal prep may be overwhelming at the beginning, but you'll learn to love it because it saves so much time and money each week, compared to preparing food each day. Cook for 2-3 hours on Sunday, freeze, you are done. I started by preparing lunch for just 3 days, then all week, then lunch and dinner. It takes a long time at the beginning, but once you learn how to optimize the process and coock many things at the same time, it becomes so easy.
As for exercise... it may not be a bad idea to start learning the complex lifts (somethig like StrongLifts 5x5 is available for free online) but your priority should be cardio, because you are so used to overeat that going into caloric deficit with no cardio will be impossible.
So it doesn't become boring, consider joining a boxing gym for a few days per week, combined with traditional cardio and some HIIT or tabata (google it) and maybe some kettlebels for variety. It's important not to do the same boring treadmill cardio 5 times per week, you'll lose motivation soon.
Finally, track progress, it's easy to loose track of where you started and think you are not making progress, so looking at the past will motivate you. Get calipers and measure your BF once per week. Take pictures from several angles once per month.