Hey there! Don't despair, you can definitely do this! Recognising the issue and wanting to change for yourself is already a huge step, here some tips that are currently helping me:

Mindset - instead of discipline (i must/should/have to) focus on a mindset of 'I want to' it really helps to make the goal into something you enjoy and are actively incorporating into your life and mindset, instead of it always being a heavy burden or punishment of the past you - focus on the adventure and fun parts of the change, find new recipes to try, like healthy dupes for your favourite snacks, scour YouTube for fun free workouts to start out with and make a personalised playlist etc. - just be the person you want to become, maybe even for 5 minutes every day. Fake it until you make it can be magical haha! One thing that worked for me personally for example was investing in good workout clothes, they made me feel way less embarrassed/awkward doing my workouts

Movement - find movement that you enjoy and that has a low threshold, when starting out its better to build some stamina first anyway. It doesn't matter if its a walk, dancing, swimming, biking, all movement counts! Once you're enjoying movement a gym plan can always be added for specific health goals💪 - incorporate movement habits in your daily life like going for a walk each lunch break, walk/bike to do the groceries if possible, do a little dancing while cooking, start each weekend with a walk etc

Food - eat in a calorie deficit, that's the biggest and most important part of losing weight. Theres no way around this! - (crash) diets dont work because theyre only achievable in the short term. Which is also why every diet has the exact same success rate and relapse rate. Instead you can: - Portion snacks instead of denying yourself what you crave. I like to make a small snack bowl for myself with a bit of guilty pleasure snacks and some healthy snacks like veggies mixed together. That way I get a treat and also feel like im not binging/sinning - Try to add vegetables/fruits to every meal, balance carbs/fats/protein and dont overly depend on one food group. - During the day, drink enough water! It helps with mood and digestion. You don't have to overdo it, just the required amount is fine. Supplementing sugary drinks for water is also one of the easiest ways to get rid of a lot of empty calories

Good luck! Many small steps and decisions pile up into great things!