It is not only possible, but easy.
1st things 1st is you have to identify and correct why you allowed yourself to get to 285 lbs. Just working out and eating right will not fix the underlying issue. It will only address the fat on your body temporarily and fat is just a symptom of a bigger issue. You can shed the fat, but if that problem is still there then the fat will come back. Is it depression? Is it lack of health/food education? Is it lack of fitness knowledge? Once you figure out what it is and address it, then you will instantly be on your way to your goal.
Also understand that this takes time. For some reason when people want to lose weight or get fit, they create this unnecessary deadline in their head as if the world will end if they do not meet it. This can take years to happen. It doesn't have to be next month. The most important thing is to become more fit and healthier and by wanting to start that process you are already on your way.
1. Face Reality - Go get a check up at the doctor. Find out your blood pressure, weight, body fat, BMI, etc... Once people hear these results and advice from a medical professional, it usually gives them the kick in the ass they need to get going.
2. Stop Making Excuses - You do know there are hours before 9am and hours after 5pm right? By that logic only jobless people should be in shape. You only need 30 - 60 minutes of exercise a day. You probably waste hours on your phone or watching TV. Understand you are making excuses and break that habit. The mind is extremely powerful. If you tell yourself negative things it is hard to make any progress. If you find yourself saying things like: "There isn't enough time" or "I'm too tired after work" or "I don't have access to a gym" etc.. then know that those are excuses and not real. MAKE THE TIME.
3. Change Your Diet - This is the most important step! You have to cut back or eliminate all the sugary and salty foods and drinks. Start cooking your food. Seriously! You can eat comfort foods, but just the mere fact that you are cooking it means you control what goes in it. YouTube will be a Godsend. There are literally millions of channels dedicated to teaching you how to cook healthy meals that are still good. And it is actually easier than you think. You don't have to eat bland chicken and rice with salads. You don't have to be like these IG fitness trainers that tell you to precisely measure everything you eat and count all calories and macros for everything. You can still eat tasty food, just healthier versions. Plus this saves you a gang of money. You can literally Google: "Pizza healthier version" and you will be amazed. Your diet is key. You can't out train a poor diet.
4. Create A Plan - This is important. If you don't know where to start, don't try to start. Plan it out first. Go week by week. How many times a week do you think you can work out? How long do you want to work out for? How many times can you cook in a week? Are you going to meal prep? What kind of exercise do I want to do? Once you have a thought out plan in place you will be more likely to stick with it instead of just winging it and being all over the place.
5. Exercise - This is #4 because it is the easy part. Understand that you do not need a gym to exercise. Again there are literally millions of videos on YouTube that have workouts you can do with minimal, to no equipment in you basement. The most important thing is to know how you want to exercise. Find a form of working out that you enjoy and can incorporate into your regimen. HIIT, Basketball, Rock Climbing, Swimming, Boxing, Running, CrossFit, etc... If you do not enjoy working out, you more than likely will quit and end up back to being overweight. If you do go to the gym, go in with workout plans. Know what you want to work and how many reps or how many intervals you will do. Going in without a plan usually leads to wandering around aimlessly and being in the gym for an hour, but only actually working out for 10 minutes.
6. Monitor Your Progress - This is important too. Take pictures of your body every day or every week or every couple of weeks. You look at your body everyday, so it's hard to notice any changes, but if you have photos to compare you can easily see changes/results. Once you start seeing results, I promise that will drive you to go even harder. Periodically weigh yourself. Do not let a number on a scale control you. Weight can play games with your head. Think about it like this; If you are 200 lbs and you lose 10 lbs of fat, but pack on 11 lbs of muscle you will be 201 lbs. The scale will be higher, but more than likely your body will be smaller. An alternative to weighing yourself is taking your measurements each week. Your weight fluctuates during the day, but your body measurements stay the same.
At the end of the day it is easy. Talk is cheap. We all want to reach body goals, but talking means nothing. You have to get off your ass and start TODAY.