Looking for exercises

Hello!! I am roughly 5'5 and 200 pounds I would like to lose weight, but my main goal is to flatten my stomach, I know I need to make dietary changes, but what exercises can help me achieve a flat stomach? 

bicycle crunches and Russian twists!!!! those r my fav to do 4 ab strength and also lots of cardio ;-; I usually do 20 sit ups, 20 bicycle crunches (each side) and 20 Russian twists (each side) morning and night whenever I have the energy to keep up w that schedule

So this is just how my experience went but I had to collectively lose all the fat and not just on my stomach (trust me I tried, lol, used to be 5'2 and 170). The biggest thing for me was just eating better and eating less. For example, I no longer drink soda or flavored drinks unless it's an energy drink. That immediately helped a lot and made me feel a lot better to just stick to drinking a ton of water throughout the day. 

If you need to figure out a workout plan for yourself or just general health advice, I find trainer winny and matos on youtube are both helpful. Trainer Winny's tier list videos are good for explaining each exercise out for beginners. 

count calories and stay in a deficit 

working out and cardio just let you burn more thus have more play eating wise but you dont HAVE to

the hardest part for me was always making myself get into a routine. the way i fixed that was replacing filling time with phone/scrolling with exercise. i.e. i get home from work, i'm tired and sore and i need to wind down... instead of sitting on the couch on my phone, i started to sit down wherever my cat was hanging out and do stretches/situps while hanging out with him. i got the idea from a dude i know who says that he does 30 situps every morning while waiting for his kettle to boil because otherwise he was just staring out the window. i realized that there's a lot of time in my life where i'm too exhausted to think and i just do whatever's easiest to get me through that moment, but i don't watch tv, and i use a phone with no social media or any of that really addictive stuff on it, so a lot of the time i was literally just opening up my phone and staring at the clock over my wallpaper for minutes on end LOL. i thought, well, i might as well idly engage my brain with counting and moving onto some other move i know and feeling my body adjust to it. that's not answering your question about what exercises to do, but i hope it helps in some way with that tricky motivation part :^)

@jackiejackal I will definitely be locking after fall break to get into a routine!! I just dropped a class so I may fill that hour with the gym instead >:3